Migrate from Quart to Flask and add MariaDB dynamic database

Major Changes:
- Migrated web framework from Quart (async) to Flask (sync)
- Added MariaDB database integration with SQLAlchemy ORM
- Implemented dynamic content management for portfolio

New Features:
- Database models for Profile, Skills, Projects, ProjectTags, and SocialLinks
- RESTful API endpoints for CRUD operations on all entities
- Database initialization script (init_db.py) with sample data
- Docker Compose configuration with MariaDB service

Modified Files:
- app.py: Replaced Quart with Flask, added database initialization
- config.py: Added database configuration with environment variables
- routes/home.py: Converted async to sync, added database queries
- requirements.txt: Replaced Quart/Hypercorn with Flask/Gunicorn, added Flask-SQLAlchemy and PyMySQL
- docker-compose.yml: Added MariaDB service with health checks
- templates/: Updated all templates to use dynamic data from database with Jinja2
- .env.example: Added database configuration variables
- README.md: Complete rewrite with new setup instructions and API documentation

New Files:
- models.py: SQLAlchemy models for all database entities
- init_db.py: Database initialization script
- routes/api.py: REST API endpoints for content management

Benefits:
- Simplified architecture (sync vs async)
- Better ecosystem compatibility
- Dynamic content management via database
- Easy content updates through REST API
- Improved deployment with standard WSGI server (Gunicorn)

requirements.txt

@@ -1,24 +1,32 @@
-aiofiles==24.1.0
-annotated-types==0.7.0
-blinker==1.9.0
-click==8.1.8
+# Core Flask Framework
 Flask==3.1.0
-h11==0.14.0
-h2==4.1.0
-hpack==4.0.0
-Hypercorn==0.17.3
-hyperframe==6.0.1
-itsdangerous==2.2.0
 Jinja2==3.1.5
+Werkzeug==3.1.3
+click==8.1.8
+itsdangerous==2.2.0
 MarkupSafe==3.0.2
-priority==2.0.0
+blinker==1.9.0
+
+# Database - Flask-SQLAlchemy and MariaDB/MySQL driver
+Flask-SQLAlchemy==3.1.1
+SQLAlchemy==2.0.36
+PyMySQL==1.1.1
+cryptography==44.0.0
+
+# Configuration Management
 pydantic==2.10.4
 pydantic-settings==2.7.1
 pydantic_core==2.27.2
 python-dotenv==1.0.1
-Quart==0.20.0
+annotated-types==0.7.0
 typing_extensions==4.12.2
-Werkzeug==3.1.3
-wsproto==1.2.0
+
+# Testing
 httpx==0.27.0
+pytest==8.3.4
+
+# Documentation
 Sphinx==8.2.3
+
+# WSGI Server (Production alternative to Flask dev server)
+gunicorn==23.0.0