new powerup upgrade implemented

src/pwncore/routes/powerups.py

@@ -0,0 +1,27 @@
+#based on the issue #69
+from pwncore.config import config, powerups
+from pwncore.types import PowerUpType
+
+async def upgrade_question(question, team):
+
+    upgrade_cost = powerups[PowerUpType.UPGRADE]["cost"]
+
+
+    if question.difficulty_level >= config.max_difficulty:
+        raise Exception("Question difficulty is already at maximum.")
+
+    if team.points < upgrade_cost:
+        raise Exception("Insufficient points to upgrade.")
+
+
+    question.difficulty_level += 1
+    team.points -= upgrade_cost
+
+    await question.save()
+    await team.save()
+
+    return {
+        "status": "success",
+        "new_difficulty": question.difficulty,
+        "remaining_points": team.points
+    }