feat(mindmodel): add CLI wrapper and tests

tests/scripts/mindmodel/test_cli.py

@@ -0,0 +1,14 @@
+import os
+
+
+def test_cli_with_nonexistent_manifest():
+    """Calling cli.main with a non-existent manifest should return non-zero."""
+    from scripts.mindmodel import cli
+
+    # Provide a path that is extremely unlikely to exist
+    fake_manifest = "/this/path/does/not/exist/manifest.json"
+
+    code = cli.main([fake_manifest])
+
+    assert isinstance(code, int)
+    assert code != 0