Add backend site management for collective topics and topics

- Introduced new backend site management features including the ability to accept, unaccept, save, edit, and display topics and collective topics.
- Added new views for editing and listing collective topics and topics.
- Implemented necessary backend logic in the `BackendSites` and `factory\BackendSites` classes to handle CRUD operations for topics and collective topics.
- Updated the layout to include links for accessing the new backend features based on user permissions.

.vscode/ftp-kr.sync.cache.json

@@ -28,8 +28,8 @@
         },
         "class.Cron.php": {
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-          "size": 9096,
-          "lmtime": 1745269340417,
+          "size": 9186,
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           "modified": false
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         "class.DbModel.php": {
@@ -139,8 +139,8 @@
           },
           "class.Tasks.php": {
             "type": "-",
-            "size": 20791,
-            "lmtime": 1745269325909,
+            "size": 20898,
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             "modified": false
           },
           "class.Users.php": {
@@ -167,7 +167,7 @@
       "config.php": {
         "type": "-",
         "size": 355,
-        "lmtime": 1741350062102,
+        "lmtime": 1745877418166,
         "modified": false
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       "cron.php": {