feat: add collapsible settings panel and resizable notes list (v0.1.2)

- Settings panel in categories sidebar now collapses/expands with toggle button
- Settings collapsed by default to save space
- Notes list column now resizable with drag handle (240px-600px range)
- Improved UI flexibility and space management

package.json

@@ -1,7 +1,7 @@
 {
   "name": "nextcloud-notes-tauri",
   "private": true,
-  "version": "0.1.1",
+  "version": "0.1.2",
   "type": "module",
   "scripts": {
     "dev": "vite",