Adds a script to create and manage GitHub teams based on a YAML config file.
Supports parent-child team relationships and a `--dry-run` mode to preview
changes without applying them.
Also creates an initial configuration for `community-plugins` teams.
This replaces the earlier proof-of-concept from backstage/community-plugins#3946
with a functional implementation using the GitHub API.
Signed-off-by: Beth Griggs <bethanyngriggs@gmail.com>
Beth Griggs