fix(ci): suppress shellcheck warning for reserved YELLOW variable (#200)

- Add shellcheck disable directive for SC2034 (unused variable)
- YELLOW color code is reserved for future warning messages
- Fixes CI failure in installer-checks workflow when install.sh is modified
- Resolves blocking issue for PR #198

scripts/hooks/pre-commit

@@ -18,6 +18,7 @@ cd "$(git rev-parse --show-toplevel)"
 # Colors
 GREEN='\033[0;32m'
 RED='\033[0;31m'
+# shellcheck disable=SC2034  # YELLOW reserved for future warning messages
 YELLOW='\033[1;33m'
 NC='\033[0m'