feat: add Cleanflix Connector Tauri desktop app

Move the Mac Tauri UI (pro.cleanflix.connector) into this repo under desktop/. Bundled Node runtime stays gitignored; package scripts fetch it when building.

.gitignore

@@ -1 +1,9 @@
 .env
+
+# Tauri desktop
+desktop/node_modules/
+desktop/src-tauri/target/
+desktop/sidecar/node/
+desktop/dist/
+._*
+**/.DS_Store