feat: Major updates to backend structure and security enhancements

- Removed `COMMON_ERRORS.md` file to streamline documentation.
- Added `Flask-Limiter` for rate limiting and `redis` for session management in `requirements.txt`.
- Expanded `ROADMAP.md` to include completed security features and planned enhancements for version 2.2.
- Enhanced `setup_myp.sh` for ultra-secure kiosk installation, including system hardening and security configurations.
- Updated `app.py` to integrate CSRF protection and improved logging setup.
- Refactored user model to include username and active status for better user management.
- Improved job scheduler with uptime tracking and task management features.
- Updated various templates for a more cohesive user interface and experience.

backend/app/node_modules/eastasianwidth/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "eastasianwidth",
+  "version": "0.2.0",
+  "description": "Get East Asian Width from a character.",
+  "main": "eastasianwidth.js",
+  "files": [
+    "eastasianwidth.js"
+  ],
+  "scripts": {
+    "test": "mocha"
+  },
+  "repository": "git://github.com/komagata/eastasianwidth.git",
+  "author": "Masaki Komagata",
+  "license": "MIT",
+  "devDependencies": {
+    "mocha": "~1.9.0"
+  }
+}