Add app version management, update checks, and periodic SW updates

- Introduced version.json and appVersionAssetPlugin for build-time version tracking.
- Enhanced settings page with update check/status UI.
- Refactored bootstrap to handle SW updates and initiate periodic checks.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "lonc-web",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "lonc-web",
-      "version": "0.1.3",
+      "version": "0.1.4",
       "dependencies": {
         "@zxing/browser": "^0.1.5",
         "alpinejs": "^3.14.9",