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/nostr-tools/lib/esm/nip75.js

@@ -0,0 +1,47 @@
+// kinds.ts
+var ZapGoal = 9041;
+
+// nip75.ts
+function generateGoalEventTemplate({
+  amount,
+  content,
+  relays,
+  a,
+  closedAt,
+  image,
+  r,
+  summary,
+  zapTags
+}) {
+  const tags = [
+    ["amount", amount],
+    ["relays", ...relays]
+  ];
+  closedAt && tags.push(["closed_at", closedAt.toString()]);
+  image && tags.push(["image", image]);
+  summary && tags.push(["summary", summary]);
+  r && tags.push(["r", r]);
+  a && tags.push(["a", a]);
+  zapTags && tags.push(...zapTags);
+  const eventTemplate = {
+    created_at: Math.floor(Date.now() / 1e3),
+    kind: ZapGoal,
+    content,
+    tags
+  };
+  return eventTemplate;
+}
+function validateZapGoalEvent(event) {
+  if (event.kind !== ZapGoal)
+    return false;
+  const requiredTags = ["amount", "relays"];
+  for (const tag of requiredTags) {
+    if (!event.tags.find(([t]) => t == tag))
+      return false;
+  }
+  return true;
+}
+export {
+  generateGoalEventTemplate,
+  validateZapGoalEvent
+};