added coverage helper script

coverage.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+import os
+import argparse
+import webbrowser
+
+
+def generate_cov_report(open_report: bool):
+    os.environ["RUSTFLAGS"] = "-Cinstrument-coverage"
+    os.environ["LLVM_PROFILE_FILE"] = "target/coverage/%p-%m.profraw"
+    os.system("cargo test")
+    os.system(
+        "grcov . -s . --binary-path ./target/debug/ -t html --branch --ignore-not-existing "
+        "-o ./target/debug/coverage/"
+    )
+    if open_report:
+        coverage_report_path = os.path.abspath("./target/debug/coverage/index.html")
+        webbrowser.open_new_tab(coverage_report_path)
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Generate coverage report and optionally open it in a browser")
+    parser.add_argument("--open", action="store_true", help="Open the coverage report in a browser")
+    args = parser.parse_args()
+    generate_cov_report(args.open)
+
+
+if __name__ == "__main__":
+    main()