feat(app-backend): build tauri desktop app backend, clipboard listener, and system tray

app/src-tauri/capabilities/default.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "../gen/schemas/desktop-schema.json",
+  "identifier": "default",
+  "description": "Capability for the main window",
+  "windows": ["*"],
+  "permissions": [
+    "core:default",
+    "opener:default",
+    "core:window:default",
+    "notification:default",
+    "global-shortcut:default",
+    "clipboard-manager:default",
+    "process:default",
+    "autostart:default"
+  ]
+}