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/@eslint/eslintrc/universal.js

@@ -0,0 +1,9 @@
+// Jest (and probably some other runtimes with custom implementations of
+// `require`) doesn't support `exports` in `package.json`, so this file is here
+// to help them load this module. Note that it is also `.js` and not `.cjs` for
+// the same reason - `cjs` files requires to be loaded with an extension, but
+// since Jest doesn't respect `module` outside of ESM mode it still works in
+// this case (and the `require` in _this_ file does specify the extension).
+
+// eslint-disable-next-line no-undef
+module.exports = require("./dist/eslintrc-universal.cjs");