Add js web stuff to landing page + documentation

go/webui/autotable.go

@@ -1,4 +1,4 @@
-// Port of web/uikit/AutoTable.tsx — the whole of it, in one file, as the original
+// Port of jsruntime/uikit/AutoTable.tsx — the whole of it, in one file, as the original
 // was. The banners below divide it into sections:
 //
 //   - Render shell        the column model, and the header/body/pagination markup