tools: add sync-version.js to sync package.json -> Tauri files

- Add tools/sync-version.js script to read root package.json version
  and update src-tauri/tauri.conf.json and src-tauri/Cargo.toml.
- Update only the [package] version line in Cargo.toml to preserve formatting.
- Include JSON read/write helpers and basic error handling/reporting.

package.json

@@ -1,17 +1,20 @@
 {
   "name": "radio-tauri",
   "private": true,
-  "version": "0.1.0",
+  "version": "0.1.1",
   "type": "module",
   "scripts": {
     "dev": "tauri dev",
     "dev:native": "node tools/copy-binaries.js && node tools/copy-ffmpeg.js && tauri dev",
     "ffmpeg:download": "powershell -NoProfile -ExecutionPolicy Bypass -File scripts/download-ffmpeg.ps1",
-    "build": "node tools/copy-binaries.js && node tools/copy-ffmpeg.js && tauri build && node tools/post-build-rcedit.js",
+    "version:sync": "node tools/sync-version.js",
+    "build": "node tools/sync-version.js && node tools/copy-binaries.js && node tools/copy-ffmpeg.js && node tools/write-build-flag.js set && tauri build && node tools/post-build-rcedit.js && node tools/write-build-flag.js clear",
+    "build:devlike": "node tools/sync-version.js && node tools/copy-binaries.js && node tools/copy-ffmpeg.js && node tools/write-build-flag.js set --debug && cross-env RADIO_DEBUG_DEVTOOLS=1 tauri build && node tools/post-build-rcedit.js && node tools/write-build-flag.js clear",
     "tauri": "node tools/copy-binaries.js && node tools/copy-ffmpeg.js && tauri"
   },
   "devDependencies": {
     "@tauri-apps/cli": "^2",
+    "cross-env": "^7.0.3",
     "npx": "^3.0.0",
     "rcedit": "^1.1.2"
   }