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/nip10.js

@@ -0,0 +1,103 @@
+// nip10.ts
+function parse(event) {
+  const result = {
+    reply: void 0,
+    root: void 0,
+    mentions: [],
+    profiles: [],
+    quotes: []
+  };
+  let maybeParent;
+  let maybeRoot;
+  for (let i = event.tags.length - 1; i >= 0; i--) {
+    const tag = event.tags[i];
+    if (tag[0] === "e" && tag[1]) {
+      const [_, eTagEventId, eTagRelayUrl, eTagMarker, eTagAuthor] = tag;
+      const eventPointer = {
+        id: eTagEventId,
+        relays: eTagRelayUrl ? [eTagRelayUrl] : [],
+        author: eTagAuthor
+      };
+      if (eTagMarker === "root") {
+        result.root = eventPointer;
+        continue;
+      }
+      if (eTagMarker === "reply") {
+        result.reply = eventPointer;
+        continue;
+      }
+      if (eTagMarker === "mention") {
+        result.mentions.push(eventPointer);
+        continue;
+      }
+      if (!maybeParent) {
+        maybeParent = eventPointer;
+      } else {
+        maybeRoot = eventPointer;
+      }
+      result.mentions.push(eventPointer);
+      continue;
+    }
+    if (tag[0] === "q" && tag[1]) {
+      const [_, eTagEventId, eTagRelayUrl] = tag;
+      result.quotes.push({
+        id: eTagEventId,
+        relays: eTagRelayUrl ? [eTagRelayUrl] : []
+      });
+    }
+    if (tag[0] === "p" && tag[1]) {
+      result.profiles.push({
+        pubkey: tag[1],
+        relays: tag[2] ? [tag[2]] : []
+      });
+      continue;
+    }
+  }
+  if (!result.root) {
+    result.root = maybeRoot || maybeParent || result.reply;
+  }
+  if (!result.reply) {
+    result.reply = maybeParent || result.root;
+  }
+  ;
+  [result.reply, result.root].forEach((ref) => {
+    if (!ref)
+      return;
+    let idx = result.mentions.indexOf(ref);
+    if (idx !== -1) {
+      result.mentions.splice(idx, 1);
+    }
+    if (ref.author) {
+      let author = result.profiles.find((p) => p.pubkey === ref.author);
+      if (author && author.relays) {
+        if (!ref.relays) {
+          ref.relays = [];
+        }
+        author.relays.forEach((url) => {
+          if (ref.relays?.indexOf(url) === -1)
+            ref.relays.push(url);
+        });
+        author.relays = ref.relays;
+      }
+    }
+  });
+  result.mentions.forEach((ref) => {
+    if (ref.author) {
+      let author = result.profiles.find((p) => p.pubkey === ref.author);
+      if (author && author.relays) {
+        if (!ref.relays) {
+          ref.relays = [];
+        }
+        author.relays.forEach((url) => {
+          if (ref.relays.indexOf(url) === -1)
+            ref.relays.push(url);
+        });
+        author.relays = ref.relays;
+      }
+    }
+  });
+  return result;
+}
+export {
+  parse
+};