Add accessibility features: high contrast, blue filter, grayscale, image toggle, and cursor size adjustments

- Implemented high contrast mode toggle with state persistence.
- Added blue filter toggle with visual effect and state persistence.
- Introduced grayscale mode toggle with state persistence.
- Included option to hide/show images with state persistence.
- Added functionality to increase/decrease cursor size with visual feedback.
- Enhanced font size controls with increment, decrement, and reset options.
- Updated accessibility panel UI and button labels for clarity.
- Ensured all new features are accessible and maintain user preferences across sessions.

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

@@ -98,7 +98,7 @@
     },
     "google-merchant_id-1.xml": {
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-      "size": 18879143,
+      "size": 18781656,
       "lmtime": 0,
       "modified": true
     },