Initial codebase structure

- Complete Gemini server implementation with logging
- Add comprehensive documentation (README.md, AGENTS.md)
- Implement certificate management guidelines
- Add .gitignore for security and build artifacts
- All unit tests passing (14/14)
- Ready for production deployment

.gitignore

@@ -0,0 +1,22 @@
+# Rust build artifacts
+/target/
+Cargo.lock
+
+# Development files
+*.log
+*.md.tmp
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# TLS certificates - NEVER commit to repository
+*.pem
+*.key
+*.crt
+certs/
+certbot/
+
+# IDE files
+.vscode/
+.idea/