change: parse repository root

scripts/shared/__init__.py

@@ -0,0 +1,11 @@
+import subprocess
+from pathlib import Path
+
+
+def get_git_root() -> Path:
+    proc = subprocess.run(
+        ["git", "rev-parse", "--show-toplevel"], capture_output=True, text=True
+    )
+    if proc.returncode != 0:
+        raise OSError("Failed to parse git root")
+    return Path(proc.stdout.rstrip())