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/lib/shared/ast-utils.js

@@ -0,0 +1,29 @@
+/**
+ * @fileoverview Common utils for AST.
+ *
+ * This file contains only shared items for core and rules.
+ * If you make a utility for rules, please see `../rules/utils/ast-utils.js`.
+ *
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+"use strict";
+
+const breakableTypePattern = /^(?:(?:Do)?While|For(?:In|Of)?|Switch)Statement$/u;
+const lineBreakPattern = /\r\n|[\r\n\u2028\u2029]/u;
+const shebangPattern = /^#!([^\r\n]+)/u;
+
+/**
+ * Creates a version of the `lineBreakPattern` regex with the global flag.
+ * Global regexes are mutable, so this needs to be a function instead of a constant.
+ * @returns {RegExp} A global regular expression that matches line terminators
+ */
+function createGlobalLinebreakMatcher() {
+    return new RegExp(lineBreakPattern.source, "gu");
+}
+
+module.exports = {
+    breakableTypePattern,
+    lineBreakPattern,
+    createGlobalLinebreakMatcher,
+    shebangPattern
+};