Add grouping/filtering by PR meeting/high priority labels

[fire]

Discussed on rocketchat about the review meeting virtual team and high priority virtual team.

[YuriSizov]

I've been thinking about it a bit... We don't use high priority for PRs, only for issues (and this page doesn't track issues so far). That leaves "for pr meeting". Now, I could add it as a "team", but it doesn't provide much benefit over just opening a search like https://github.com/godotengine/godot/pulls?q=is%3Apr++is%3Aopen+label%3A%22for+pr+meeting%22+.

What could be useful, is adding a filter "for PR meeting" that would only show PRs with that label assigned to each team/reviewer. What do you think?

[fire]

What's the best way to show experimental features so I can try them? I don't know.

[YuriSizov]

I'm afraid we don't have much in terms of different dev/staging/production environments 🙃 We should start from the problem that we are trying to solve. Given only one of the proposed labels is actually useful, what would be the use-case for it? Simply listing all the PR meeting tasks can be done with the link that I've provided above. Do we need more in-depth information that the team reports page gives, like how long it has been open and other details?

What I'm thinking here, is that having "marked for PR meeting" as a generic filter can help each team open their list and see if they have any PRs that are marked. Having all of those PRs in a single united list is less useful for individual teams, or individual reviewers.

[fire]

The problem:

Given

What are the github pull requests I can focus attention upon for maximum impact and least effort?

Make the page show this for me.

[fire]

Another related problem is what pull requests require pending work from Godot Engine organization / maintainers so they can be unblocked.

[fire]

Sorry about the reposting. Wanted to separate the logical ideas.

For example the current team page scene seems to be aiming for the least amount of impact.

I changed some defaults and these pull requests do match what I think is important, and with recency.