feat(utils): add difficulty color utility and update type imports

src/lib/utils.ts

@@ -1,6 +1,6 @@
 import { twMerge } from "tailwind-merge";
 import { clsx, type ClassValue } from "clsx";
-import { EditorLanguageConfig } from "@prisma/client";
+import type { EditorLanguageConfig, Difficulty } from "@prisma/client";
 
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
@@ -12,3 +12,16 @@ export function getPath(
 ) {
   return `file:///${problemId}/${editorLanguageConfig.fileName}${editorLanguageConfig.fileExtension}`;
 }
+
+export const getDifficultyColorClass = (difficulty: Difficulty) => {
+  switch (difficulty) {
+    case "EASY":
+      return "text-green-500";
+    case "MEDIUM":
+      return "text-yellow-500";
+    case "HARD":
+      return "text-red-500";
+    default:
+      return "text-gray-500";
+  }
+};