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/remark-stringify/index.d.ts

@@ -0,0 +1,41 @@
+import type {Root} from 'mdast'
+import type {Options as ToMarkdownExtension} from 'mdast-util-to-markdown'
+import type {Plugin} from 'unified'
+import type {Options} from './lib/index.js'
+
+export type {Options} from './lib/index.js'
+
+/**
+ * Add support for serializing to markdown.
+ *
+ * @this
+ *   Unified processor.
+ * @param
+ *   Configuration (optional).
+ * @returns
+ *   Nothing.
+ */
+declare const remarkStringify: Plugin<
+  [(Readonly<Options> | null | undefined)?],
+  Root,
+  string
+>
+export default remarkStringify
+
+// Add custom settings supported when `remark-stringify` is added.
+declare module 'unified' {
+  interface Settings extends Options {}
+
+  interface Data {
+    /**
+     * List of `mdast-util-to-markdown` extensions to use.
+     *
+     * This type is registered by `remark-stringify`.
+     * Values can be registered by remark plugins that extend
+     * `mdast-util-to-markdown`.
+     * See {@link ToMarkdownExtension | `Options`} from
+     * {@link https://github.com/syntax-tree/mdast-util-to-markdown#options | `mdast-util-to-markdown`}.
+     */
+    toMarkdownExtensions?: ToMarkdownExtension[]
+  }
+}