refactor: make match-collector export its types, and consume them in frontend

frontend/server/api/champions.ts

@@ -1,4 +1,5 @@
 import type { MongoClient } from 'mongodb'
+import type { ChampionData } from 'match_collector'
 import { connectToDatabase, fetchLatestPatch } from '../utils/mongo'
 
 async function champions(client: MongoClient, patch: string) {
@@ -11,7 +12,6 @@ async function champions(client: MongoClient, patch: string) {
     if (x.lanes != undefined && x.lanes != null) {
       for (const lane of x.lanes) {
         delete lane.builds
-        delete lane.runes
       }
     }
   })