feat: Add comprehensive documentation suite and reorganize project structure

- Created complete documentation in docs/ directory
- Added PROJECT_OVERVIEW.md with feature highlights and getting started guide
- Added ARCHITECTURE.md with system design and technical details
- Added SECURITY.md with comprehensive security implementation guide
- Added DEVELOPMENT.md with development workflows and best practices
- Added DEPLOYMENT.md with production deployment instructions
- Added API.md with complete REST API documentation
- Added CONTRIBUTING.md with contribution guidelines
- Added CHANGELOG.md with version history and migration notes
- Reorganized all documentation files into docs/ directory for better organization
- Updated README.md with proper documentation links and quick navigation
- Enhanced project structure with professional documentation standards

f_data/data_lists/.htaccess

@@ -0,0 +1,3 @@
+<Files ~ "\.(php*|s?p?html|cgi|pl|py|asp|aspx|sh|cin)$">
+deny from all
+</Files>

f_data/data_lists/IP-based-frontend.tpl

@@ -0,0 +1,3 @@
+173.0.81.0/24
+173.0.82.0/24
+173.0.83.0/24

f_data/data_lists/allowed-email-domains.tpl

@@ -0,0 +1,2 @@
+gmail.com
+yahoo.com

f_data/data_lists/reserved-usernames.tpl

@@ -0,0 +1,3 @@
+admin
+root
+youtube