[MM-37984] Allow Desktop App to authenticate via external providers outside of the app on supported servers (#23795)

* WIP

* Add rate limiting for desktop token API

* Missing mocks

* Style fixes

* Update snapshots

* Maybe use an actual redirect link :P

* Refactoring for tests

* Add tests for server

* Fix lint issue

* Fix tests

* Fix lint

* Add front-end screen component

* Component logic

* Style changes

* Quick style fix

* Lint fixes

* Initial PR feedback

* Enable logging into the browser as well when completing the login process

* Refactor to push more logic to the other component

* Remove unnecessary helper code

* Fix i18n

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/store/sqlstore/store.go

@@ -105,6 +105,7 @@ type SqlStoreStores struct {
 	postAcknowledgement        store.PostAcknowledgementStore
 	postPersistentNotification store.PostPersistentNotificationStore
 	trueUpReview               store.TrueUpReviewStore
+	desktopTokens              store.DesktopTokensStore
 }
 
 type SqlStore struct {
@@ -226,6 +227,7 @@ func New(settings model.SqlSettings, metrics einterfaces.MetricsInterface) *SqlS
 	store.stores.postAcknowledgement = newSqlPostAcknowledgementStore(store)
 	store.stores.postPersistentNotification = newSqlPostPersistentNotificationStore(store)
 	store.stores.trueUpReview = newSqlTrueUpReviewStore(store)
+	store.stores.desktopTokens = newSqlDesktopTokensStore(store, metrics)
 
 	store.stores.preference.(*SqlPreferenceStore).deleteUnusedFeatures()
 
@@ -1077,6 +1079,10 @@ func (ss *SqlStore) TrueUpReview() store.TrueUpReviewStore {
 	return ss.stores.trueUpReview
 }
 
+func (ss *SqlStore) DesktopTokens() store.DesktopTokensStore {
+	return ss.stores.desktopTokens
+}
+
 func (ss *SqlStore) DropAllTables() {
 	var tableSchemaFn string
 	if ss.DriverName() == model.DatabaseDriverPostgres {