Frontend updates: caching basic data (json) from CDragon

Implement caching in the patch_detector, consume the cache from API routes in frontend

frontend/server/api/cdragon/summoner-spells.ts

@@ -0,0 +1,14 @@
+import { getSummonerSpells } from '~/server/utils/cdragon-cache'
+
+export default defineEventHandler(async () => {
+  try {
+    const summonerSpells = await getSummonerSpells()
+    return summonerSpells
+  } catch (error) {
+    console.error('Error fetching summoner spells:', error)
+    throw createError({
+      statusCode: 500,
+      statusMessage: 'Failed to fetch summoner spells'
+    })
+  }
+})