Add js web stuff to landing page + documentation

go/jsruntime/runtime/@solidjs/router/dist/routers/HashRouter.d.ts

@@ -0,0 +1,9 @@
+import type { JSX } from "solid-js";
+import type { BaseRouterProps } from "./components.js";
+export declare function hashParser(str: string): string;
+export type HashRouterProps = BaseRouterProps & {
+    actionBase?: string;
+    explicitLinks?: boolean;
+    preload?: boolean;
+};
+export declare function HashRouter(props: HashRouterProps): JSX.Element;