Abstract away cache. 2 implementations: redis and memory

src/NadekoBot/Common/Pokemon/SearchPokemon.cs

@@ -1,11 +1,12 @@
 #nullable disable
-using Newtonsoft.Json;
+
+using System.Text.Json.Serialization;
 
 namespace NadekoBot.Common.Pokemon;
 
 public class SearchPokemon
 {
-    [JsonProperty("num")]
+    [JsonPropertyName("num")]
     public int Id { get; set; }
 
     public string Species { get; set; }