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/app/proguard-rules.pro

@@ -0,0 +1,12 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+
+# Keep native methods
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+# Keep Wails bridge classes
+-keep class com.wails.app.WailsBridge { *; }
+-keep class com.wails.app.WailsJSBridge { *; }