initial work for components view

Signed-off-by: Sanjula Ganepola <sanjulagane@gmail.com>

src/views/githubLocalActionsTreeItem.ts

@@ -0,0 +1,7 @@
+import { MarkdownString, TreeItem } from "vscode";
+
+export interface GithubLocalActionsTreeItem extends TreeItem {
+    getChildren: () => GithubLocalActionsTreeItem[] | Promise<GithubLocalActionsTreeItem[]>;
+
+    getToolTip?: () => Promise<MarkdownString | string | undefined>;
+}