Update .pre-commit-config.yaml and Implement Suggestions

[nv-rliu]

Closes #11

Notes for Reviewers

This PR was mainly designed to consolidate (previously) lint.yaml into pre-commit-hooks.yaml. I tried to preserve all the hooks from lint.yaml and remove hooks/directories/etc that are no longer needed. Feel free to let me know if some of these checks are redundant or seem incorrect.

Proposed Changes

• Add additional script to ignore in .flake8 config
• Merged previous lint.yaml file into .pre-commit-config.yaml
  • Updated hooks to latest version
• Redirect pyproject_dir in dependencies.yaml after getting rid of the old python/nx-cugraph dir
• Remove a bunch of old cugraph docs
• Update pyproject.toml using pre-commit

[jameslamb]

I left some suggestions for your consideration.

Other notes:

• please add CI here in this PR just running pre-commit (similar to introduce minimal CI for PRs cugraph-gnn#56). That'd make us more confident in these changes
• There are many references in this diff to "cugraph" which really should be "nx-cugraph". I suspect there are more that are in the repo but didn't show up in the diff... those should be fixed (can be a follow-up PR).