Add missing 404 response to Swagger (#27038)

Most middleware throw a 404 in case something is not found e.g. a Repo
that is not existing. But most API endpoints don't include the 404
response in their documentation. This PR changes this.

routers/api/v1/org/hook.go

@@ -37,6 +37,8 @@ func ListHooks(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/HookList"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	utils.ListOwnerHooks(
 		ctx,
@@ -66,6 +68,8 @@ func GetHook(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/Hook"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	hook, err := utils.GetOwnerHook(ctx, ctx.ContextUser.ID, ctx.ParamsInt64("id"))
 	if err != nil {
@@ -103,6 +107,8 @@ func CreateHook(ctx *context.APIContext) {
 	// responses:
 	//   "201":
 	//     "$ref": "#/responses/Hook"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	utils.AddOwnerHook(
 		ctx,
@@ -139,6 +145,8 @@ func EditHook(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/Hook"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	utils.EditOwnerHook(
 		ctx,
@@ -170,6 +178,8 @@ func DeleteHook(ctx *context.APIContext) {
 	// responses:
 	//   "204":
 	//     "$ref": "#/responses/empty"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	utils.DeleteOwnerHook(
 		ctx,