ci: add fix-code

Author: georgik

scripts/fix-code.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -euo pipefail
+
+# This script formats the code using cargo fmt, runs cargo clippy with auto-fix,
+# and if any files were modified, stages and commits them.
+
+echo "Running cargo fmt to format code..."
+cargo fmt --all
+
+echo "Running cargo clippy with auto-fix (requires nightly)..."
+cargo clippy --all-features --workspace --fix --allow-dirty
+
+echo "Running tests..."
+cargo test --all
+