add clan_core path helper function

pkgs/clan-cli/tests/root.py

@@ -4,12 +4,13 @@ import pytest
 
 TEST_ROOT = Path(__file__).parent.resolve()
 PROJECT_ROOT = TEST_ROOT.parent
+CLAN_CORE = PROJECT_ROOT.parent.parent
 
 
 @pytest.fixture(scope="session")
 def project_root() -> Path:
     """
-    Root directory of the tests
+    Root directory the clan-cli
     """
     return PROJECT_ROOT
 
@@ -20,3 +21,11 @@ def test_root() -> Path:
     Root directory of the tests
     """
     return TEST_ROOT
+
+
+@pytest.fixture(scope="session")
+def clan_core() -> Path:
+    """
+    Directory of the clan-core flake
+    """
+    return CLAN_CORE