Add main features

• Category & Keywords
• Archive
  • Timeline
• Comment (based on loment)
• Statistics (based on listat)
• Pages & Layouts
• Feeds (ATOM & RSS)
• Server render mode without WASM

First release with minimum core features

First release with minimum features:

• Post
  • 3 types: article, slides, notes
  • Keyword
  • Category
• Basic SDK tool
  • Static generator
• UI based on Ant Design
• GitHub Pages deploy
  • Actions supported