feat(auth): add username sign-in mode and recovery kits (#3215)

fluxer_docs/src/content/docs/admin-api/index.mdx

@@ -338,6 +338,7 @@ An entry with any other action has `access` set to `write`.
 | change_username | A username or discriminator was changed |
 | clear_fields<sup>1</sup> | Profile fields of an account, or fields of a guild, were cleared |
 | create_admin_api_key | An Admin API key was created |
+| create_password_reset_link | A password reset link was created for an account |
 | create_registration_url | A registration URL was issued |
 | create_voice_region | A voice region was created |
 | create_voice_server | A voice server was registered |
@@ -369,6 +370,7 @@ An entry with any other action has `access` set to `write`.
 | resend_verification_email | An email verification message was requested again for an account |
 | resolve_report | A report was updated or resolved |
 | revoke_admin_api_key | An Admin API key was revoked |
+| revoke_recovery_kit | The recovery kit of an account was revoked |
 | revoke_registration_url | A registration URL was revoked |
 | schedule_deletion | Account deletion was scheduled |
 | send_password_reset | A password reset message was requested for an account |
@@ -575,7 +577,9 @@ The registry is returned in this order by [List ACLs](#list-acls). A value outsi
 | report:view:reporter_pii<sup>6</sup> | Unredacts the contact fields a reporter supplied |
 | system_dm:send | Sends an official direct message from the instance to one or many accounts |
 | user:cancel:bulk_message_deletion | Cancels the bulk message deletion an account scheduled for itself |
+| user:create:password_reset_link | Creates a password reset link on an instance where members sign in with a username |
 | user:delete | Schedules or cancels account deletion |
+| user:delete:recovery_kit | Revokes a recovery kit on an instance where members sign in with a username |
 | user:list:dm_channels | Reads a user's direct message and group direct message channels |
 | user:list:guilds | Reads a user's guild memberships |
 | user:list:relationships | Reads a user's relationships |