Add js web stuff to landing page + documentation

go/jsruntime/runtime/solid-js/h/jsx-runtime/dist/jsx.js

@@ -0,0 +1,10 @@
+import h from 'solid-js/h';
+
+function Fragment(props) {
+  return props.children;
+}
+function jsx(type, props) {
+  return h(type, props);
+}
+
+export { Fragment, jsx, jsx as jsxDEV, jsx as jsxs };