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/update-browserslist-db/README.md

@@ -0,0 +1,22 @@
+# Update Browserslist DB
+
+<img width="120" height="120" alt="Browserslist logo by Anton Popov"
+     src="https://browsersl.ist/logo.svg" align="right">
+
+CLI tool to update `caniuse-lite` with browsers DB
+from [Browserslist](https://github.com/browserslist/browserslist/) config.
+
+Some queries like `last 2 versions` or `>1%` depend on actual data
+from `caniuse-lite`.
+
+```sh
+npx update-browserslist-db@latest
+```
+
+<a href="https://evilmartians.com/?utm_source=update-browserslist-db">
+  <img src="https://evilmartians.com/badges/sponsored-by-evil-martians.svg"
+       alt="Sponsored by Evil Martians" width="236" height="54">
+</a>
+
+## Docs
+Read full docs **[here](https://github.com/browserslist/update-db#readme)**.