Megachat Support v0.1.0

Added

• Initial public release of Megachat Support WordPress plugin.
• AI provider integration (OpenAI / Gemini).
• Telegram bot webhook with secret authentication.
• Admin logs UI with wide layout.
• Knowledge Base via CSV (Google Sheets).
• Branding options (light/dark logos).

Security

• Licensed under GPL-2.0-or-later.
• Added license.txt and readme.txt to plugin package.