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/ios/app_options_default.go

@@ -0,0 +1,10 @@
+//go:build !ios
+
+package main
+
+import "github.com/wailsapp/wails/v3/pkg/application"
+
+// modifyOptionsForIOS is a no-op on non-iOS platforms
+func modifyOptionsForIOS(opts *application.Options) {
+	// No modifications needed for non-iOS platforms
+}