adding new extract command to extract selector or main content as markdown, updateing version as 0.5.0

tests/test_api.py

@@ -182,6 +182,21 @@ class TestSearch:
         assert mock_send.call_args[0][1]["background"] is True
 
 
+class TestExtract:
+    def test_extract_markdown_default(self, b, mock_send):
+        mock_send.return_value = "# Title"
+
+        result = b.extract_markdown()
+
+        assert result == "# Title"
+        mock_send.assert_called_once_with("extract.markdown", {"selector": None}, profile=None)
+
+    def test_extract_markdown_selector(self, b, mock_send):
+        b.extract_markdown("article")
+
+        mock_send.assert_called_once_with("extract.markdown", {"selector": "article"}, profile=None)
+
+
 # ── Tabs ──────────────────────────────────────────────────────────────────────
 
 class TestTabs: