v0.1: replace shell-rendered site with Grav-native pages + theme

- Drop site/ + RenderSite.sh: repo now carries grav/user/pages as
  native Grav markdown pages (home/services/terms/sign/execution)
- Add knel-contract theme: inherits quark2 via stream fallback, adds
  sign.html.twig (Twig) driving the DocuSeal flow through the APISIX
  gateway; esign wiring lives in the theme yaml for forks to retarget
- CreateDocument.sh refreshes the Grav services page from the
  rendered catalogs instead of invoking the removed site renderer

Ticket: https://projects.knownelement.com/issues/924

CreateDocument.sh

@@ -16,5 +16,16 @@ bash RenderCSVToMarkdown.sh
 echo "Putting it all together..."
 bash RenderBook.sh
 
-echo "Rendering Grav site..."
-bash RenderSite.sh
+echo "Refreshing the Grav services page from the rendered catalogs..."
+{
+  echo "---"
+  echo "title: 'Services'"
+  echo "visible: true"
+  echo "menu: Services"
+  echo "---"
+  cat src/services-general.md
+  for f in cloudron-all cloudron-lob coolify-techops-all coolify-techops-lob coolify-randd-all coolify-randd-lob kneldc-all kneldc-lob; do
+    echo
+    cat src/services-$f.md
+  done
+} > grav/user/pages/02.services/default.md