feat: add author filter command to template filtering (#19202)

Can do `author:username` to filter templates created by a certain
author. Adding to help clean out some templates that I created on our
dev instance. This makes sorting a bit easier.

coderd/database/modelqueries.go

@@ -82,6 +82,8 @@ func (q *sqlQuerier) GetAuthorizedTemplates(ctx context.Context, arg GetTemplate
 		pq.Array(arg.IDs),
 		arg.Deprecated,
 		arg.HasAITask,
+		arg.AuthorID,
+		arg.AuthorUsername,
 	)
 	if err != nil {
 		return nil, err