refactor: reorganize codebase — move browse CLI to browse/ directory

Restructure project layout: src/ → browse/src/, test/ → browse/test/. Add snapshot testing. Update docs, package.json, and skills integration. Add setup script and TODO tracking.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

browse/test/test-server.ts

@@ -0,0 +1,47 @@
+/**
+ * Tiny Bun.serve for test fixtures
+ * Serves HTML files from test/fixtures/ on a random available port
+ */
+
+import * as path from 'path';
+import * as fs from 'fs';
+
+const FIXTURES_DIR = path.resolve(import.meta.dir, 'fixtures');
+
+export function startTestServer(port: number = 0): { server: ReturnType<typeof Bun.serve>; url: string } {
+  const server = Bun.serve({
+    port,
+    hostname: '127.0.0.1',
+    fetch(req) {
+      const url = new URL(req.url);
+      let filePath = url.pathname === '/' ? '/basic.html' : url.pathname;
+
+      // Remove leading slash
+      filePath = filePath.replace(/^\//, '');
+      const fullPath = path.join(FIXTURES_DIR, filePath);
+
+      if (!fs.existsSync(fullPath)) {
+        return new Response('Not Found', { status: 404 });
+      }
+
+      const content = fs.readFileSync(fullPath, 'utf-8');
+      const ext = path.extname(fullPath);
+      const contentType = ext === '.html' ? 'text/html' : 'text/plain';
+
+      return new Response(content, {
+        headers: { 'Content-Type': contentType },
+      });
+    },
+  });
+
+  const url = `http://127.0.0.1:${server.port}`;
+  return { server, url };
+}
+
+// If run directly, start and print URL
+if (import.meta.main) {
+  const { server, url } = startTestServer(9450);
+  console.log(`Test server running at ${url}`);
+  console.log(`Fixtures: ${FIXTURES_DIR}`);
+  console.log('Press Ctrl+C to stop');
+}