Chore/prune dead examples - #521

Remove examples whose underlying service or dependency no longer exists:

- deta: Deta Space shut down 2024-10-17 and deta.sh data was deleted in
  May 2023; the `deta` npm package is marked deprecated.
- faunadb: Fauna ended the service on 2025-05-30 and fauna.com no longer
  resolves.
- markdown-blog: @tinyhttp/markdown is 404 on the npm registry and its
  GitHub repo is gone, so the example cannot be installed.
- turbo-http: unmaintained since 2022, and the example has to disable all
  tinyhttp extensions to work, so it demonstrates very little.

These double as `tinyhttp new <name>` CLI templates, so the first three
were broken scaffold commands rather than merely stale docs.

Also refresh two stale examples:

- ws: bump tinyws to ^1.0.0 and adapt to its new API, which replaces
  `app.use(tinyws())` with `tinyws(app, server)` after `app.listen()`,
  and scope upgrades to /chat via the new `paths` option. Add the `ws`
  peer dependency, without which the example was never installable.
- vue-ssr: drop vue-server-renderer, which is Vue 2's renderer and unused
  since the code imports Vue 3's built-in vue/server-renderer. Sync the
  CDN importmap pin with the vue dependency and drop the es-module-shims
  tag, as import maps have been Baseline widely available since Safari
  16.4 in March 2023.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

The /chat handler only ever responded when `req.ws` was set, so an
ordinary HTTP GET to /chat hung forever with no response. Mirror the
pattern from tinyws' own README and reply over HTTP when the request
is not a WebSocket upgrade.

Verified against tinyws 1.0.0 and @tinyhttp/app 3.0.11 installed the way
`tinyhttp new ws` resolves them: two clients connect and broadcast
between each other, the `paths` option refuses upgrades outside /chat,
and GET /chat now returns 200 instead of hanging.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>