v1.0.0: Add MIT license, English README, and open-source promotion docs.

v1.0.0 — first stable release

Self-hosted panel for VPS/hosting renewals, payment links, provider sync, Telegram reminders.

Highlights

• One-command install (Docker + Caddy)
• Provider catalog (~36 hosts) + BILLmanager / Web API sync
• Telegram reminders and encrypted backups
• Passphrase-wrapped encryption key (SECURITY.md)

Full changelog: CHANGELOG.md