Rename branch (#199)

This is more important now that import app is available and not every
git repo will be initialized with `main` as the default branch. This
handles the other common case which is the `master` branch.

src/preload.ts

@@ -73,6 +73,7 @@ const validInvokeChannels = [
   "check-ai-rules",
   "select-app-folder",
   "check-app-name",
+  "rename-branch",
 ] as const;
 
 // Add valid receive channels