Add fullscreen and preview modes

- Add --fullscreen flag for macOS native fullscreen (AppleScript)
- Add --preview flag to highlight elements before actions
- Add --preview-delay to configure highlight duration
- Update README with new options

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

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@saiden/browse",
-  "version": "0.2.13-pre.0",
+  "version": "0.2.13",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@saiden/browse",
-      "version": "0.2.13-pre.0",
+      "version": "0.2.13",
       "license": "MIT",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.26.0",