docs(pages): add GitHub Pages landing page mirroring kportal's design

- docs/index.html  — full landing page (Tailwind CDN, FA icons, Inter+JetBrains Mono,
  light/dark mode, glass-morphism nav, hero + features + comparison + install +
  usage + examples grid + codegen pipeline + advanced collapsibles + footer)
- docs/logo-light.svg / logo-dark.svg — paper-plane wordmark SVGs
- docs/CNAME — go-telegram.raczylo.com
- .github/workflows/pages.yml — GitHub Pages deploy from docs/ on push to main

ACTION REQUIRED: enable GitHub Pages in repo Settings → Pages → Source: GitHub Actions.
Add a DNS CNAME record: go-telegram.raczylo.com → lukaszraczylo.github.io

.github/workflows/pages.yml

@@ -0,0 +1,33 @@
+name: pages
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'docs/**'
+      - '.github/workflows/pages.yml'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/configure-pages@v5
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs/
+      - id: deployment
+        uses: actions/deploy-pages@v4