fix(tools/git): -h/--help now exits 0 across 7 wrappers (#702)

packages/mosaic/framework/tools/git/pr-list.sh

@@ -34,7 +34,7 @@ Examples:
     $(basename "$0") -s merged -a username    # Merged PRs by user
     $(basename "$0") --repo ddk/ai-bma         # List PRs from anywhere
 EOF
-    exit 1
+    exit "${1:-1}"
 }
 
 # Parse arguments
@@ -61,7 +61,7 @@ while [[ $# -gt 0 ]]; do
             shift 2
             ;;
         -h|--help)
-            usage
+            usage 0
             ;;
         *)
             echo "Unknown option: $1" >&2