Implemented hybrid cache for user sessions, api keys and database provided settings. Cleaned up startup and adjusted caching option models for features

Moonlight.Api/Startup/Startup.Cache.cs

@@ -0,0 +1,34 @@
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Moonlight.Api.Configuration;
+
+namespace Moonlight.Api.Startup;
+
+public partial class Startup
+{
+    private static void AddCache(WebApplicationBuilder builder)
+    {
+        // Load cache options
+        var cacheOptions = new CacheOptions();
+        builder.Configuration.GetSection("Moonlight:Cache").Bind(cacheOptions);
+
+        builder.Services.AddMemoryCache();
+        builder.Services.AddHybridCache();
+
+        if (!cacheOptions.EnableLayer2)
+            return;
+
+        var redisOptions = new RedisOptions();
+        builder.Configuration.GetSection("Moonlight:Redis").Bind(redisOptions);
+
+        if(!redisOptions.Enable)
+            return;
+        
+        builder.Services.AddStackExchangeRedisCache(options =>
+        {
+            options.Configuration = redisOptions.ConnectionString;
+            options.InstanceName = "Moonlight:";
+        });
+    }
+}