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/index.d.ts

@@ -0,0 +1,11 @@
+/// <reference types="remark-parse" />
+/// <reference types="remark-stringify" />
+
+import type {Root} from 'mdast'
+import type {Processor} from 'unified'
+
+/**
+ * Create a new unified processor that already uses `remark-parse` and
+ * `remark-stringify`.
+ */
+export const remark: Processor<Root, undefined, undefined, Root, string>