* feat: allow invites in normal registration mode + invite privilege
* feat: select groups to join from an invite
* test: check if groups from invitations have been joined
* fix: remove unused variable
* feat: write API versions of socket calls
* docs: openapi specs for the new routes
* test: iron out mongo redis difference
* refactor: move inviteGroups endpoint into write API
* refactor: use GET /api/v3/users/:uid/invites/groups
Instead of GET /api/v3/users/:uid/inviteGroups
* fix: no need for /api/v3 prefix when using api module
* fix: tests
* refactor: change POST /api/v3/users/invite
To POST /api/v3/users/:uid/invites
* refactor: make helpers.invite awaitable
* fix: restrict invite API to self-use only
* fix: move invite groups controller to write api, +tests
* fix: tests
Co-authored-by: Julian Lam <julian@nodebb.org>
