tests: add conftest to include repo root on sys.path

Author: mauriciomenon

tests/conftest.py

@@ -0,0 +1,7 @@
+import os
+import sys
+
+# Ensure the repository root is on sys.path so tests can import top-level modules
+ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
+if ROOT not in sys.path:
+    sys.path.insert(0, ROOT)