feat: `settings.yaml`

[Autoparallel]

Task

We should create a settings.yaml that we want to use globally. We have one in ronkathon which I'll just paste here:

# These settings are synced to GitHub by https://probot.github.io/apps/settings/
# Requires sign up, and allowing Probot to manage your repos.

repository:
  # name: ronkathon # sets the repo name
  description: ronkathon
  # homepage: docs.rs/ronkathon
  private: false
  has_issues: true
  has_projects: false
  has_wiki: false
  has_downloads: false
  default_branch: main
  allow_squash_merge: true
  allow_merge_commit: false
  allow_rebase_merge: false

# # Labels: define labels for Issues and Pull Requests
# labels:
#   - name: bug
#     color: CC0000
#   - name: feature
#     color: 336699
#   - name: first-timers-only
#     # include the old name to rename and existing label
#     oldname: Help Wanted

# # Collaborators: give specific users access to this repository.
# collaborators:
#   - username: bkeepers
#     # Note: Only valid on organization-owned repositories.
#     # The permission to grant the collaborator. Can be one of:
#     # * `pull` - can pull, but not push to or administer this repository.
#     # * `push` - can pull and push, but not administer this repository.
#     # * `admin` - can pull, push and administer this repository.
#     permission: push

#   - username: hubot
#     permission: pull
#   - username:
#     permission: pull

It'd be worth looking through what options we have and what we want to be uniform across the org.