Refine repository structure

- Update .gitignore for dev/ and tmp/ directories
- Move certificate setup to dev/ directory with README
- Remove production references from AGENTS.md
- Clean up directory structure and documentation
- Repository now ready for development workflow

README.md

@@ -29,31 +29,25 @@ port = 1965
 log_level = "info"
 ```
 
-## Certificate Setup
-
-### Development
-Generate self-signed certificates for local testing:
+## Development Setup
 
+### Quick Start with Self-Signed Certs
 ```bash
-mkdir -p certs
-openssl req -x509 -newkey rsa:2048 -keyout certs/key.pem -out certs/cert.pem -days 365 -nodes -subj "/CN=localhost"
+mkdir -p dev
+openssl req -x509 -newkey rsa:2048 \
+  -keyout dev/key.pem \
+  -out dev/cert.pem \
+  -days 365 \
+  -nodes \
+  -subj "/CN=localhost"
 ```
 
 Update `config.toml`:
 ```toml
-cert = "certs/cert.pem"
-key = "certs/key.pem"
+cert = "dev/cert.pem"
+key = "dev/key.pem"
 ```
 
-### Production
-Use Let's Encrypt for production:
-
-```bash
-sudo certbot certonly --standalone -d yourdomain.com
-```
-
-Then update config.toml paths to your certificate locations.
-
 Run the server:
 
 ```bash