add moveing of tabs and groups, multi browser support, auto complite into terminal, extract html and adding testing

browser_cli/commands/extract.py

@@ -66,3 +66,10 @@ def extract_json(selector):
     """Parse and pretty-print JSON content inside SELECTOR."""
     data = _handle("extract.json", {"selector": selector})
     console.print_json(json.dumps(data))
+
+
+@extract_group.command("html")
+def extract_html():
+    """Print the full HTML of the active tab to stdout."""
+    html = _handle("extract.html")
+    click.echo(html or "")