chore(wails): scaffold v3 project boilerplate

Wails v3 replaces the NPM-only dev entry point. This adds the Go module,
Taskfile, build metadata, and a minimal window shell without touching
frontend logic.

Co-authored-by: Cursor <cursoragent@cursor.com>

build/android/main_android.go

@@ -0,0 +1,11 @@
+//go:build android
+
+package main
+
+import "github.com/wailsapp/wails/v3/pkg/application"
+
+func init() {
+	// Register main function to be called when the Android app initializes
+	// This is necessary because in c-shared build mode, main() is not automatically called
+	application.RegisterAndroidMain(main)
+}