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

.gitignore

@@ -0,0 +1,29 @@
+easystream
+vendor/
+node_modules/
+dist/
+coverage/
+tests/coverage/
+tests/results/
+
+# Environment & local configs
+.env
+.env.local
+.DS_Store
+Thumbs.db
+
+# Runtime data
+f_data/cache/
+f_data/logs/
+f_data/sessions/
+f_data/uploads/
+f_data/thumbs/
+
+# IDE/editor
+.idea/
+.vscode/
+*.code-workspace
+
+# OS files
+desktop.ini
+$RECYCLE.BIN/