feat: enhanced dataset management and UI improvements

- Submitter/DatasetController.ts: improved validations for time_absolute, time_min, and time_max.
- validators/dataset.ts: enhanced validations for time_absolute, time_min, and time_max.
- Added new favicon.ico for better branding.
- Improved password-meter.vue component with clearer hint messages.
- Updated checkStrength.ts: enhanced checkStrength() method for password strength validation.
- submitter/Dataset/Create.vue: added form controls for time_min, time_max, and/or time_absolute fields.
- submitter/Dataset/Edit.vue: introduced a loading spinner during file upload for better UX.

public/assets/manifest.json

@@ -97,6 +97,5 @@
   "assets/images/marker-icon.png": "http://localhost:8080/assets/images/marker-icon.2b3e1faf.png",
   "assets/images/layers-2x.png": "http://localhost:8080/assets/images/layers-2x.8f2c4d11.png",
   "assets/images/layers.png": "http://localhost:8080/assets/images/layers.416d9136.png",
-  "assets/images/Close.svg": "http://localhost:8080/assets/images/Close.e4887675.svg",
-  "assets/vendors-node_modules_vue-facing-decorator_dist_esm_index_js-node_modules_vue-facing-decorator-818045.js": "http://localhost:8080/assets/vendors-node_modules_vue-facing-decorator_dist_esm_index_js-node_modules_vue-facing-decorator-818045.js"
+  "assets/images/Close.svg": "http://localhost:8080/assets/images/Close.e4887675.svg"
 }