POC: Add /remind_me quick action

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/149938



Merged-by: Tetiana Chupryna <tchupryna@gitlab.com>
Approved-by: Sebastian Rehm <srehm@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Tetiana Chupryna <tchupryna@gitlab.com>
Reviewed-by: Tetiana Chupryna <tchupryna@gitlab.com>
Reviewed-by: Sincheol (David) Kim <dkim@gitlab.com>
Co-authored-by: Kerri Miller <kerrizor@kerrizor.com>