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/org.go

@@ -70,6 +70,8 @@ func ListMyOrgs(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/OrganizationList"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	listUserOrgs(ctx, ctx.Doer)
 }
@@ -98,6 +100,8 @@ func ListUserOrgs(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/OrganizationList"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	listUserOrgs(ctx, ctx.ContextUser)
 }
@@ -295,6 +299,8 @@ func Get(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/Organization"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	if !organization.HasOrgOrUserVisible(ctx, ctx.Org.Organization.AsUser(), ctx.Doer) {
 		ctx.NotFound("HasOrgOrUserVisible", nil)
@@ -334,6 +340,8 @@ func Edit(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/Organization"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 	form := web.GetForm(ctx).(*api.EditOrgOption)
 	org := ctx.Org.Organization
 	org.FullName = form.FullName
@@ -374,6 +382,8 @@ func Delete(ctx *context.APIContext) {
 	// responses:
 	//   "204":
 	//     "$ref": "#/responses/empty"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	if err := org.DeleteOrganization(ctx.Org.Organization); err != nil {
 		ctx.Error(http.StatusInternalServerError, "DeleteOrganization", err)