test: add CLI tests to crewai-cli package

Move and adapt all CLI tests from lib/crewai/tests/cli/ to
lib/cli/tests/, updating import paths from crewai.cli.* to
crewai_cli.* and adjusting mock targets accordingly.

lib/cli/tests/test_constants.py

@@ -0,0 +1,20 @@
+from crewai_cli.constants import ENV_VARS, MODELS, PROVIDERS
+
+
+def test_huggingface_in_providers():
+    """Test that Huggingface is in the PROVIDERS list."""
+    assert "huggingface" in PROVIDERS
+
+
+def test_huggingface_env_vars():
+    """Test that Huggingface environment variables are properly configured."""
+    assert "huggingface" in ENV_VARS
+    assert any(
+        detail.get("key_name") == "HF_TOKEN" for detail in ENV_VARS["huggingface"]
+    )
+
+
+def test_huggingface_models():
+    """Test that Huggingface models are properly configured."""
+    assert "huggingface" in MODELS
+    assert len(MODELS["huggingface"]) > 0