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/applesauce-react/dist/helpers/build-link-renderer.js

@@ -0,0 +1,23 @@
+import { Fragment as _Fragment, jsx as _jsx } from "react/jsx-runtime";
+import { memo, useMemo } from "react";
+export function buildLinkRenderer(handlers) {
+    const LinkRenderer = ({ node }) => {
+        const content = useMemo(() => {
+            try {
+                const url = new URL(node.href);
+                for (const handler of handlers) {
+                    try {
+                        const content = handler(url, node);
+                        if (content)
+                            return content;
+                    }
+                    catch (e) { }
+                }
+            }
+            catch (error) { }
+            return null;
+        }, [node.href, node.value]);
+        return content || _jsx(_Fragment, { children: node.value });
+    };
+    return memo(LinkRenderer);
+}