Add js web stuff to landing page + documentation

go/jsruntime/runtime/@solidjs/router/dist/data/index.d.ts

@@ -0,0 +1,4 @@
+export { createAsync, createAsyncStore, type AccessorWithLatest } from "./createAsync.js";
+export { action, useSubmission, useSubmissions, useAction, type Action } from "./action.js";
+export { query, revalidate, cache, type CachedFunction } from "./query.js";
+export { redirect, reload, json } from "./response.js";