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/is-fullwidth-code-point/readme.md

@@ -0,0 +1,39 @@
+# is-fullwidth-code-point [![Build Status](https://travis-ci.org/sindresorhus/is-fullwidth-code-point.svg?branch=master)](https://travis-ci.org/sindresorhus/is-fullwidth-code-point)
+
+> Check if the character represented by a given [Unicode code point](https://en.wikipedia.org/wiki/Code_point) is [fullwidth](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms)
+
+
+## Install
+
+```
+$ npm install is-fullwidth-code-point
+```
+
+
+## Usage
+
+```js
+const isFullwidthCodePoint = require('is-fullwidth-code-point');
+
+isFullwidthCodePoint('谢'.codePointAt(0));
+//=> true
+
+isFullwidthCodePoint('a'.codePointAt(0));
+//=> false
+```
+
+
+## API
+
+### isFullwidthCodePoint(codePoint)
+
+#### codePoint
+
+Type: `number`
+
+The [code point](https://en.wikipedia.org/wiki/Code_point) of a character.
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)