cli[minor]: Add langgraph new command (#2369)

Adds a "new" command to create langgraph application from a template.

libs/cli/langgraph_cli/cli.py

@@ -15,6 +15,7 @@ from langgraph_cli.constants import DEFAULT_CONFIG, DEFAULT_PORT
 from langgraph_cli.docker import DockerCapabilities
 from langgraph_cli.exec import Runner, subp_exec
 from langgraph_cli.progress import Progress
+from langgraph_cli.templates import TEMPLATE_HELP_STRING, create_new
 from langgraph_cli.version import __version__
 
 OPT_DOCKER_COMPOSE = click.option(
@@ -378,6 +379,19 @@ def dockerfile(save_path: pathlib.Path, config: pathlib.Path):
         )
 
 
+@click.argument("path", required=False)
+@click.option(
+    "--template",
+    type=str,
+    help=TEMPLATE_HELP_STRING,
+)
+@cli.command("new", help="Create a new LangGraph project from a template.")
+@log_command
+def new(path: Optional[str], template: Optional[str]) -> None:
+    """Create a new LangGraph project from a template."""
+    return create_new(path, template)
+
+
 def prepare_args_and_stdin(
     *,
     capabilities: DockerCapabilities,