Update Claudian plugin and configuration settings

- Update Claudian plugin to latest version (main.js, manifest.json, styles.css)
- Merge community plugins list with remote changes
- Update Claude Code settings and core plugins configuration

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.obsidian/core-plugins.json

@@ -14,7 +14,7 @@
   "templates": true,
   "note-composer": true,
   "command-palette": true,
-  "slash-command": false,
+  "slash-command": true,
   "editor-status": true,
   "bookmarks": true,
   "markdown-importer": true,
@@ -29,5 +29,5 @@
   "publish": false,
   "sync": false,
   "bases": true,
-  "webviewer": false
+  "webviewer": true
 }