style: Apply Prettier formatting with 4-space indentation

Applied consistent code formatting across the project using Prettier, now configured to use 4-space indentation instead of tabs.

test-results/.last-run.json

@@ -1,4 +1,4 @@
 {
-	"status": "failed",
-	"failedTests": []
+    "status": "failed",
+    "failedTests": []
 }