feat: Implement authentication provider management components

- Added new templates for managing authentication providers, including forms for creating and editing providers.
- Implemented backend logic to handle retrieval, creation, and deletion of authentication providers.
- Introduced new database migrations to support the storage of authentication provider data.
- Enhanced the user interface to display available authentication providers and their statuses.
- Added routes and handlers for managing authentication provider actions in the web application.

internal/db/migrations/migrations.go

@@ -21,6 +21,7 @@ func GetMigrations(db *gorm.DB) *gormigrate.Gormigrate {
 		AddUserNotifications(),        // 008
 		AddRcloneTables(),             // 009
 		AddRcloneCommandToConfig(),    // 010
+		AddAuthProviders(),            // 011
 	)
 
 	return gormigrate.New(db, gormigrate.DefaultOptions, migrations)