Initial release of ssl-certcheck — a simple SSL/TLS certificate inspector and expiry monitor:

- Checks and displays certificate expiry, issuer, subject, SANs, protocol version, and cipher suite for any hostname.
- Alerts if certificates are expired or expiring soon, with customizable warning threshold.
- Supports JSON output and custom ports.
- Pure Python, zero dependencies.
- Suitable for scripting, auditing, and HTTPS security monitoring.