[fork-setup] Prepare how we'll merge PRs / how to communicate with PR authors

[bew]

Prepare how we'll merge PRs

I think I'd like to avoid duplicating PRs that are being worked on Wezterm (by default), so they can continue working there.

👉 FIXME: is this a bad idea?

When a PR is ready (is marked Approved in our PR triage project), we could copy the PR to RezTerm, run our CI and merge.
👉 Need a script to help with that 🤔 (in https://github.com/rezterm-org/z-project-helpers)

Prepare how to communicate with PR authors

For PRs we're evaluating to include in the fork but that are not ready yet, we should have a prepared message to post on original PR to link to the announcement, the fork, and what they can do (re-open the PR on RezTerm and work there, or continue working on Wezterm and we'll import the PR later on 🤔).

Need message templates for these use-cases:

hello $author, we're interested to get your unfinished PR into rezterm fork (link to announcement), willing to continue working on it? (if yes.. if not..)

hello $author, we're preparing to merge your PR in rezterm fork (link to announcement), here is how to follow progress

hello $author, FYI we've merged your PR in rezterm fork (link to announcement)

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WDYT?