feat: added sorting and retrieving by author to chirps endpoint

sql/queries/chirps.sql

@@ -19,3 +19,8 @@ WHERE id = $1;
 
 -- name: DeleteChirpById :exec
 DELETE FROM chirps WHERE id = $1;
+
+-- name: GetChirpsByAuthor :many
+SELECT id, created_at, updated_at, body, user_id FROM chirps
+WHERE user_id = $1
+ORDER BY created_at ASC;