fix:GH pages support + manage repo-collaborators

[cunla]

This looks like a big change but it is not really, just better organization:

• Support for GitHub pages for repositories => fix Support GitHub pages in the terraform management repo controls#62
• Fix the way we deal with repositories created from a template.
• Ensure all repository collaborators are managed by the terraform (i.e., remove manually added users from repository collaborators, see plan results here)
• Update django-commons-playground description and topics.
• Remove template from django-tailwind-cli (it is not from a template)
• Replace duplicate { for k, v in var.repositories : k => v if v.is_django_commons_repo == false } with local.project_repositories defined once.

[github-actions]

Terraform plan in terraform
With var files: terraform/production/org.tfvars terraform/production/repositories.tfvars
With variables: github_token = (sensitive value)

Plan: 6 to import, 0 to add, 6 to change, 0 to destroy.

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
!~  update in-place

Terraform will perform the following actions:

  # github_repository.this["django-commons-playground"] will be updated in-place
!~  resource "github_repository" "this" {
!~      description                 = "A sample project to test things out" -> "A sample project with best practices for Django Commons projects."
        id                          = "django-commons-playground"
        name                        = "django-commons-playground"
!~      topics                      = [
+           "django",
+           "python",
+           "template",
        ]
#        (35 unchanged attributes hidden)

#        (1 unchanged block hidden)
    }

  # github_repository_collaborators.this["django-commons-playground"] will be imported
    resource "github_repository_collaborators" "this" {
        id             = "django-commons-playground"
        invitation_ids = {}
        repository     = "django-commons-playground"

        team {
            permission = "admin"
            team_id    = "********************************"
        }
        team {
            permission = "maintain"
            team_id    = "************************************"
        }
        team {
            permission = "pull"
            team_id    = "*************"
        }
        team {
            permission = "triage"
            team_id    = "*************************"
        }
    }

  # github_repository_collaborators.this["django-debug-toolbar"] will be updated in-place
  # (imported from "django-debug-toolbar")
!~  resource "github_repository_collaborators" "this" {
        id             = "django-debug-toolbar"
!~      invitation_ids = {} -> (known after apply)
        repository     = "django-debug-toolbar"

        team {
            permission = "admin"
            team_id    = "***************************"
        }
        team {
            permission = "maintain"
            team_id    = "*******************************"
        }
        team {
            permission = "pull"
            team_id    = "*************"
        }
        team {
            permission = "triage"
            team_id    = "********************"
        }

-       user {
-           permission = "admin" -> null
-           username   = "tim-schilling" -> null
        }
-       user {
-           permission = "push" -> null
-           username   = "jezdez" -> null
        }
    }

  # github_repository_collaborators.this["django-fsm-2"] will be updated in-place
  # (imported from "django-fsm-2")
!~  resource "github_repository_collaborators" "this" {
        id             = "django-fsm-2"
!~      invitation_ids = {} -> (known after apply)
        repository     = "django-fsm-2"

        team {
            permission = "admin"
            team_id    = "*******************"
        }
        team {
            permission = "maintain"
            team_id    = "***********************"
        }
        team {
            permission = "pull"
            team_id    = "*************"
        }
        team {
            permission = "triage"
            team_id    = "************"
        }

-       user {
-           permission = "admin" -> null
-           username   = "pfouque" -> null
        }
-       user {
-           permission = "push" -> null
-           username   = "adamchainz" -> null
        }
    }

  # github_repository_collaborators.this["django-tailwind-cli"] will be updated in-place
  # (imported from "django-tailwind-cli")
!~  resource "github_repository_collaborators" "this" {
        id             = "django-tailwind-cli"
!~      invitation_ids = {} -> (known after apply)
        repository     = "django-tailwind-cli"

        team {
            permission = "admin"
            team_id    = "**************************"
        }
        team {
            permission = "maintain"
            team_id    = "******************************"
        }
        team {
            permission = "pull"
            team_id    = "*************"
        }
        team {
            permission = "triage"
            team_id    = "*******************"
        }

-       user {
-           permission = "admin" -> null
-           username   = "oliverandrich" -> null
        }
    }

  # github_repository_collaborators.this["django-tasks-scheduler"] will be imported
    resource "github_repository_collaborators" "this" {
        id             = "django-tasks-scheduler"
        invitation_ids = {}
        repository     = "django-tasks-scheduler"

        team {
            permission = "admin"
            team_id    = "*****************************"
        }
        team {
            permission = "maintain"
            team_id    = "*********************************"
        }
        team {
            permission = "pull"
            team_id    = "*************"
        }
        team {
            permission = "triage"
            team_id    = "**********************"
        }
    }

  # github_repository_collaborators.this["django-typer"] will be updated in-place
  # (imported from "django-typer")
!~  resource "github_repository_collaborators" "this" {
        id             = "django-typer"
!~      invitation_ids = {} -> (known after apply)
        repository     = "django-typer"

        team {
            permission = "admin"
            team_id    = "*******************"
        }
        team {
            permission = "maintain"
            team_id    = "***********************"
        }
        team {
            permission = "pull"
            team_id    = "*************"
        }
        team {
            permission = "triage"
            team_id    = "************"
        }

-       user {
-           permission = "admin" -> null
-           username   = "bckohan" -> null
        }
    }

  # github_repository_collaborators.this["drf-excel"] will be updated in-place
!~  resource "github_repository_collaborators" "this" {
        id             = "drf-excel"
!~      invitation_ids = {} -> (known after apply)
#        (1 unchanged attribute hidden)

-       user {
-           permission = "admin" -> null
-           username   = "FlipperPA" -> null
        }
-       user {
-           permission = "admin" -> null
-           username   = "browniebroke" -> null
        }
-       user {
-           permission = "maintain" -> null
-           username   = "rptmat57" -> null
        }

#        (4 unchanged blocks hidden)
    }

Plan: 6 to import, 0 to add, 6 to change, 0 to destroy.

📝 Plan generated in Plan org changes and list them in a PR #33

[tim-schilling]

Unrelated to this change, but I'm definitely in favor of renaming this repo or creating a new one that's more explicitly, best-practices