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/utils.js

@@ -0,0 +1,25 @@
+const { EOL } = require('os')
+
+const getFirstRegexpMatchOrDefault = (text, regexp, defaultValue) => {
+  regexp.lastIndex = 0 // https://stackoverflow.com/a/11477448/4536543
+  let match = regexp.exec(text)
+  if (match !== null) {
+    return match[1]
+  } else {
+    return defaultValue
+  }
+}
+
+const DEFAULT_INDENT = '  '
+const INDENT_REGEXP = /^([ \t]+)[^\s]/m
+
+module.exports.detectIndent = text =>
+  getFirstRegexpMatchOrDefault(text, INDENT_REGEXP, DEFAULT_INDENT)
+module.exports.DEFAULT_INDENT = DEFAULT_INDENT
+
+const DEFAULT_EOL = EOL
+const EOL_REGEXP = /(\r\n|\n|\r)/g
+
+module.exports.detectEOL = text =>
+  getFirstRegexpMatchOrDefault(text, EOL_REGEXP, DEFAULT_EOL)
+module.exports.DEFAULT_EOL = DEFAULT_EOL