chore(website): derive the counters from data, refresh them weekly

The star, fork, contributor and release counts were typed into the templates
by hand, so they only moved when somebody remembered. They had already
drifted: stars read 48,042 against 48,067, forks 4,314 against 4,320, and
contributors 224 against 225.

They move to website/data/stats.yaml, which .github/ci/refresh-site-counters.sh
rewrites from the GitHub API, run weekly by a new workflow. The contributors
and releases endpoints never report a total, so the script asks for one item
per page and reads the count out of the Link header. It refuses to write a
zero or a non-number, which is what a rate-limited or failed call looks like,
and the workflow commits only when a number actually moved. The Discord count
has no API behind it, so the script reads the existing value back and carries
it through.

The engine count was wrong in a second way. The hero said 18, the section
heading said "Eighteen engines", the timeline said "Nineteen engines of our
own", and the /engines/ page derived 19 from the data file. All of them now
derive from that same file, so they cannot disagree again.

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Assisted-by: Claude Code:claude-opus-5[1m]

.github/workflows/refresh-site-counters.yml

@@ -0,0 +1,44 @@
+name: Refresh site counters
+
+# The landing page shows a star count, a contributor count and a release
+# count. They were typed in by hand, so they drifted the moment somebody
+# forgot. This pulls the real numbers once a week and commits them only when
+# they have actually moved, which in turn triggers the usual Pages deploy.
+
+on:
+  schedule:
+    # Mondays, 06:17 UTC. Off the hour on purpose, since the scheduler queues
+    # everything that asks for :00 and drops what it cannot run.
+    - cron: '17 6 * * 1'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+concurrency:
+  group: refresh-site-counters
+  cancel-in-progress: false
+
+jobs:
+  refresh:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Read the counts off the GitHub API
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: ./.github/ci/refresh-site-counters.sh
+
+      - name: Commit only if something moved
+        run: |
+          if git diff --quiet -- website/data/stats.yaml; then
+            echo "counters unchanged, nothing to commit"
+            exit 0
+          fi
+          git diff --unified=0 -- website/data/stats.yaml
+          git config user.name  "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add website/data/stats.yaml
+          git commit -m "chore(website): refresh the counters"
+          git push