refactor(data): add mock API adapters, id utility, and toast feedback

lib/api/players.ts

@@ -0,0 +1,13 @@
+import { usePlayerStore } from "@/store/players"
+
+export function listPlayers() {
+  return usePlayerStore.getState().players
+}
+
+export function getPlayerById(playerId: string) {
+  return usePlayerStore.getState().players.find((player) => player.id === playerId)
+}
+
+export function listPlayersByShop(shopId: string) {
+  return usePlayerStore.getState().players.filter((player) => player.shopId === shopId)
+}