add endpoint to fetch packages

src/Umbraco.Web.UI.Client/temp-schema-generator/manifests.ts

@@ -11,6 +11,15 @@ export class Manifests {
 	default(@body body: ProblemDetails) {}
 }
 
+@endpoint({ method: 'GET', path: '/manifests/packages' })
+export class Packages {
+	@response({ status: 200 })
+	response(@body body: PackagesResponse) {}
+
+	@defaultResponse
+	default(@body body: ProblemDetails) {}
+}
+
 export type Manifest =
 	| IManifestSection
 	| IManifestPropertyEditorUI
@@ -32,6 +41,16 @@ export interface ManifestsResponse {
 	manifests: Manifest[];
 }
 
+export interface PackagesResponse {
+	packages: Package[];
+}
+
+export interface Package {
+	name: string;
+	alias: string;
+	version: string;
+}
+
 export interface IManifest {
 	type: string;
 	alias: string;