docs: update README and CLAUDE.md for v2 statusline

- Rewrite README for statusline architecture
- Update CLAUDE.md with new data flow and structure
- Remove obsolete v1 docs (TROUBLESHOOTING, CONTRIBUTING, etc.)
- Clean up .husky/pre-commit for new structure

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -1,33 +0,0 @@
-name: Release
-
-on:
-  push:
-    tags:
-      - 'v*.*.*'
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: oven-sh/setup-bun@v2
-        with:
-          bun-version: latest
-
-      - name: Install dependencies
-        working-directory: tui
-        run: bun install --frozen-lockfile
-
-      - name: Build TUI
-        working-directory: tui
-        run: bun run build
-
-      - name: Package artifact
-        run: tar -czf claude-hud-tui.tar.gz tui/dist tui/package.json
-
-      - name: Release artifact
-        uses: softprops/action-gh-release@v2
-        with:
-          files: claude-hud-tui.tar.gz