Add consumable invites (#5814)

* Add consumable invites

* Add UI for generating invite codes

* Add tests

* Display max uses and expiration in invites table, delete invite

* Remove unused column and redundant validator

- Default follows not used, probably bad idea
- InviteCodeValidator is redundant because RegistrationsController
  checks invite code validity

* Add admin setting to disable invites

* Add admin UI for invites, configurable role for invite creation

- Admin UI that lists everyone's invites, always available
- Admin setting min_invite_role to control who can invite people
- Non-admin invite UI only visible if users are allowed to

* Do not remove invites from database, expire them instantly

config/locales/en.yml

@@ -231,6 +231,8 @@ en:
       reset: Reset
       search: Search
       title: Known instances
+    invites:
+      title: Invites
     reports:
       action_taken_by: Action taken by
       are_you_sure: Are you sure?
@@ -269,6 +271,9 @@ en:
         deletion:
           desc_html: Allow anyone to delete their account
           title: Open account deletion
+        min_invite_role:
+          disabled: No one
+          title: Allow invitations by
         open:
           desc_html: Allow anyone to create an account
           title: Open registration
@@ -424,6 +429,25 @@ en:
       muting: Muting list
     upload: Upload
   in_memoriam_html: In Memoriam.
+  invites:
+    delete: Delete
+    expires_in:
+      '1800': 30 minutes
+      '21600': 6 hours
+      '3600': 1 hour
+      '43200': 12 hours
+      '86400': 1 day
+    expires_in_prompt: Never
+    generate: Generate
+    max_uses:
+      one: 1 use
+      other: "%{count} uses"
+    max_uses_prompt: No limit
+    prompt: Generate and share links with others to grant access to this instance
+    table:
+      expires_at: Expires
+      uses: Uses
+    title: Invite people
   landing_strip_html: "<strong>%{name}</strong> is a user on %{link_to_root_path}. You can follow them or interact with them if you have an account anywhere in the fediverse."
   landing_strip_signup_html: If you don't, you can <a href="%{sign_up_path}">sign up here</a>.
   media_attachments:

config/locales/simple_form.en.yml

@@ -30,10 +30,12 @@ en:
         data: Data
         display_name: Display name
         email: E-mail address
+        expires_in: Expire after
         filtered_languages: Filtered languages
         header: Header
         locale: Language
         locked: Lock account
+        max_uses: Max number of uses
         new_password: New password
         note: Bio
         otp_attempt: Two-factor code