feat(VSCode): Define metadata API

packages/ui/src/multiplying-architecture/KaotoEditorChannelApi.ts

@@ -12,4 +12,32 @@ export interface KaotoEditorChannelApi extends KogitoEditorChannelApi {
    * Returns the Kaoto VSCode settings defined.
    */
   getVSCodeKaotoSettings(): Promise<ISettingsModel>;
+
+  /**
+   * Get metadata querying a Kaoto metadata file.
+   * @param path The path of the file being edited
+   * @param key The key to retrieve the preferences
+   */
+  getMetadata<T>(path: string, key: string): Promise<T | undefined>;
+
+  /**
+   * Save preferences to a Kaoto metadata file.
+   * @param path The path of the file being edited
+   * @param key The key to set the preferences
+   * @param metadata The preferences to be saved
+   */
+  setMetadata<T>(path: string, key: string, metadata: T): Promise<void>;
+
+  /**
+   * Retrieve resource content
+   * @param path The path of the resource, relative to the file being edited
+   */
+  getResourceContent(path: string): Promise<string | undefined>;
+
+  /**
+   * Save resource content
+   * @param path The path of the resource, relative to the file being edited
+   * @param content The content to be saved
+   */
+  saveResourceContent(path: string, content: string): Promise<void>;
 }