Add remaining Zulip user groups

[rylev]

The following are the remaining Zulip user groups that are not yet synced between the team repo and the Zulip instance.

Please review the user groups and send pull requests adding them to the team repo (see below for instructions).

Once these are added, the Zulip user groups will be completely managed by the team repo.

• 'WG-rls2.0' @matklad
• 'WG-llvm' @nagisa
• 'WG-traits' @jackh726 (this group is inactive and only not yet archived due to limitations in the team repo)
• 'project-custom-linter' (this has never been used publicly - perhaps it's inactive?)
• 'WG-polonius' @lqd
• 'WG-rustc-dev-guide' @spastorino Add zulip-groups to rustc-dev-guide team #843
• 'WG-const-eval' Add Zulip user group for wg-const-eval #834
• 'WG-pipelining' (this was last used publicly in Jan 2020 - perhaps it's inactive?)
• 'WG-mir-opt' @oli-obk Add zulip team for wg-mir-opt #839
• 'mods'
• 'WG-governance' (I believe this working group is inactive)
• 'WG-unsafe-code-guidelines' @RalfJung manage WG-UCG Zulip group #838
• 'WG-ffi-unwind' @BatmanAoD wg-ffi-unwind zulip sync #845
• 'WG-polymorphization' @davidtwco add zulip group for wg-polymorphization #846
• 'WG-self-profile' @wesleywiser
• 'WG-async' Add Zulip config for async working group #832
• 'WG-async-sprint-planning' Add Zulip config for async working group #832
• 'WG-rfc-2229' (this working group is probably inactive)
• 'WG-diagnostics' @estebank
• 'WG-prioritization/alerts' Add a wg-prioritization/alerts Zulip user group #836
• 'project-const-generics' @lcnr
• 'T-compiler/WG-meta' (this group seems to be inactive) Archive the compiler team's wg-meta #857
• 'WG-profile-guided-optimization' (this has never been used publicly - perhaps it's inactive?)
• 'WG-nll' (this group is likely inactive) Archive wg-nll #856
• 'wg-incr-comp' @pnkfelix
• 'T-community/l10n' (this work is still active in general but not very much on Zulip)
• 'foundation'

Instructions

To add a working group follow the documentation here. More than likely this will simply involve adding the following lines to your team's toml config:

[[zulip-groups]]
name = "T-awesome-zulip-team" # Make sure to change this! 

If you need to add or remove people from the baseline of team membership, you can use the extra-people and excluded-people fields.

If someone you've added does not have a zulip-id field in their personal configuration file, you will need to add it. You can find some instructions on where to find their zulip-id here

As an example, you can see how the compiler team's configuration is set here.

[apiraino]

@rylev some thoughts while scrolling the list:

• I believe WG-Traits is not active anymore (note to self: I think it can be marked as such in this page). Am I correct @jackh726 ?
• WG-rls2.0 has been renamed to t-compiler/rust-analyzer (on Zulip). I suspect they want to propagate this new name everywhere.
• WG-rfc-2229, WG-nll, WG-pipelining, are all inactive by looking at this list

hth!

[jackh726]

wg-traits is not active anymore

NLL working group needs to be archived, so not worth adding new zulip group