Feat/web UI (#4)

* feat: add learning website with Next.js

Add interactive web interface for the Build Your Own OpenClaw tutorial:
- Next.js app with TypeScript and Tailwind CSS
- Theme provider with dark/light mode toggle
- Step card components with diff visualization
- Utilities for loading step metadata and file diffs

* chore: ignore worktrees directory

* feat(web): implement learning website with step navigation and diff viewer

- Landing page with hero section and steps overview grouped by phase
- Step detail pages with README rendering and syntax highlighting (Shiki)
- Diff comparison pages with side-by-side GitHub-style viewer
- Custom 404 Not Found page
- Components: ReadmeRenderer, CodeBlock, DiffViewer, DiffSelector
- Generates 175 static pages (18 steps + 153 diff combinations)

* feat(web): enhance UI with zane-portfolio theme and improved UX

- Update color scheme to match zane-portfolio style (warm beige light, pure black dark)
- Add scrollbar styling for light/dark modes
- Fix card border visibility in dark mode
- Add GitHub CTA section with clone command and copy button
- Add star on GitHub call-to-action
- Use favicons from zane-portfolio
- Improve diff viewer with scroll sync and collapsible files
- Add sticky header with file navigation dropdown
- Rewrite README links to GitHub and internal step pages
- Remove default create-next-app template files

* ci: add GitHub Pages deployment workflow

- Add workflow to build and deploy Next.js static site
- Configure custom domain (build-your-own-openclaw.kiyo-n-zane.com)
- Trigger on push to main branch

* fix config

* fix config

* fix config

web/next.config.ts

@@ -2,7 +2,6 @@ import type { NextConfig } from 'next'
 
 const nextConfig: NextConfig = {
   output: 'export',
-  basePath: '/build-your-own-openclaw',
 }
 
 export default nextConfig