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/tl.svg

@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="512" width="512" viewBox="0 0 512 512">
+  <defs>
+    <clipPath id="a">
+      <path fill-opacity=".67" d="M0 0h496.06v496.06H0z"/>
+    </clipPath>
+  </defs>
+  <g clip-path="url(#a)" fill-rule="evenodd" transform="scale(1.0321)">
+    <path fill="#cb000f" d="M0 0h999.07v496.06H0z"/>
+    <path d="M0 0c3.133 0 496.06 248.73 496.06 248.73L0 496.06V0z" fill="#f8c00c"/>
+    <path d="M0 0c2.084 0 330.01 248.73 330.01 248.73L0 496.06V0z"/>
+    <path d="M181.87 288.88l-58.92-13.058-30.105 51.194-4.71-57.819-58.862-12.956 53.133-24.045-3.19-57.537 38.984 42.039 53.618-24.447-27.93 52.221 37.983 44.408z" fill="#fff"/>
+  </g>
+</svg>