CI: manage stale PRs

[adeebshihadeh]

I think we want to whitelist issues with a tag and blacklist PRs with a tag.

[jnewb1]

what do you think of these rules for stale PRs:

• 30 days inactive + 7 days stale = close pr
• only delete branches that are on the main repo
• exclude "needs testing" (for stuff that we just need someone in the community to test for us, like a new car port) and "work in progress" (stuff we expect will take a while and the PR is only open for encouraging others to work on it or that we might get around to eventually)
• comments or pushes don't reset the timer, which would encourage stuff to get merged faster

[adeebshihadeh]

Suggested change

	exempt-pr-labels: "Work In Progress" # if wip, don't mark as stale
	exempt-pr-labels: "active-work-in-progress"

[jnewb1]

"active work in progress" fine? we don't have hyphens in any other label

[adeebshihadeh]

Before merging this, I'd like to look over the affected PRs. @sshane can you roughly start assigning them to people? if not sure about one, you can assign to me

[jnewb1]

our stale PR PR is about to go stale 😅

Remaining:

• ui: draw lane change indicator #28743
• Toyota: parse FW versions for more reliable fuzzy fingerprinting #28641 (labeled ignore stale)
• Honda: fix set speed on dash #28344 (labeled needs testing)
• port HR-V global #27915 (labeled ignore stale)
• VW MLB: Audi A4/S4 #27586 (labeled ignore stale)
• tools/sim: Implement MetaDrive simulator #27373 (closed, merged elsewhere)