Add service filter, batch operations, and snapshot features

- Service Filter Bar: search by name, filter by status (online/offline)
- Batch Operations: multi-select containers for start/stop/restart
- Container Snapshots: create and manage Docker checkpoints
- Added filter bar and batch action bar to index.html
- Added snapshot button to Admin tools section
- New JS modules: service-filter.js, batch-operations.js, snapshot.js
- Updated build.js to include new modules in bundle

status/build.js

@@ -25,6 +25,8 @@ const bundles = {
     JS('core', 'service-crud.js'),
     JS('core', 'service-create.js'),
     JS('live-events.js'),
+    JS('service-filter.js'),
+    JS('batch-operations.js'),
   ],
   'features.js': [
     JS('logo-customization.js'),
@@ -34,6 +36,7 @@ const bundles = {
     JS('import-export.js'),
     JS('error-logs.js'),
     JS('container-logs.js'),
+    JS('snapshot.js'),
     JS('smart-arr-connect.js'),
     JS('notification-settings.js'),
     JS('panel-tabs.js'),