docs(docs): add initial Fumadocs-based documentation site

docs/src/components/provider.tsx

@@ -0,0 +1,7 @@
+'use client';
+import type { ReactNode } from 'react';
+import { RootProvider } from 'fumadocs-ui/provider/waku';
+
+export function Provider({ children }: { children: ReactNode }) {
+  return <RootProvider>{children}</RootProvider>;
+}