ci(wiki): render option tables, pin pandoc, add visible auto-gen note

Improve the generated wiki pages:
- normalize definition-style option blocks (*name*: / typeof: / default:)
  into scdoc tables, so every module renders options as a clean table like
  the table-style pages (Bluetooth, Network, ... no longer a wall of text)
- drop pandoc's empty leading table-header row so the real header shows
- pin pandoc to 3.5 in CI (the distro 2.x man reader mangled lists into
  blockquotes); matches local output
- prepend a visible "auto-generated from master, do not edit here" note to
  every page (was an invisible HTML comment)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/workflows/wiki.yml

@@ -31,7 +31,16 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install scdoc and pandoc
-        run: sudo apt-get update && sudo apt-get install -y scdoc pandoc
+        # pandoc is pinned: the distro package can be an old 2.x whose man reader
+        # mangles lists into blockquotes. Keep this in sync with local tooling.
+        env:
+          PANDOC_VERSION: "3.5"
+        run: |
+          sudo apt-get update && sudo apt-get install -y scdoc
+          curl -fsSL -o /tmp/pandoc.deb \
+            "https://github.com/jgm/pandoc/releases/download/${PANDOC_VERSION}/pandoc-${PANDOC_VERSION}-1-amd64.deb"
+          sudo dpkg -i /tmp/pandoc.deb
+          pandoc --version | head -1
 
       - name: Clone the wiki
         run: |