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_scripts/shared/flagicon/flags/1x1/tt.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="512" width="512" viewBox="0 0 512 512">
+  <path style="width:0" fill="#fff" d="M0 0h512v512H0z"/>
+  <g fill-rule="evenodd">
+    <path d="M370.925 512.011L.047 1.071.009 511.744l370.916.267zM141.073-.003l370.878 510.94.038-510.673-370.916-.267z" fill="#e00000"/>
+    <path d="M22.192.244h94.88l374.536 511.262H393.73L22.191.244z"/>
+  </g>
+</svg>