feat: initialize markr nostr bookmark client

- Add project structure with TypeScript, React, and Vite
- Implement nostr authentication using browser extension (NIP-07)
- Add NIP-51 compliant bookmark fetching and display
- Create minimal UI with login and bookmark components
- Integrate applesauce-core and applesauce-react libraries
- Add responsive styling with dark/light mode support
- Include comprehensive README with setup instructions

This is a minimal MVP for a nostr bookmark client that allows users to
view their bookmarks according to NIP-51 specification.

node_modules/applesauce-react/README.md

@@ -0,0 +1,35 @@
+# applesauce-react
+
+React hooks and providers for applesauce
+
+## Installation
+
+```bash
+npm install applesauce-react
+```
+
+## Example
+
+```tsx
+import { EventStore, Models } from "applesauce-core";
+import { EventStoreProvider } from "applesauce-react/providers";
+import { useEventModel } from "applesauce-react/hooks";
+
+const eventStore = new EventStore();
+
+function UserName({ pubkey }) {
+  const profile = useEventModel(Models.ProfileModel, [pubkey]);
+
+  return <span>{profile.name || "loading..."}</span>;
+}
+
+function App() {
+  return (
+    <EventStoreProvider eventStore={eventStore}>
+      <h1>App</h1>
+
+      <UserName pubkey="82341f882b6eabcd2ba7f1ef90aad961cf074af15b9ef44a09f9d2a8fbfbe6a2" />
+    </EventStoreProvider>
+  );
+}
+```