Applied codestyle to all .cs files

src/NadekoBot/Db/Extensions/DbExtensions.cs

@@ -1,4 +1,4 @@
-#nullable disable
+#nullable disable
 using Microsoft.EntityFrameworkCore;
 using NadekoBot.Services.Database.Models;
 
@@ -9,4 +9,4 @@ public static class DbExtensions
     public static T GetById<T>(this DbSet<T> set, int id)
         where T : DbEntity
         => set.FirstOrDefault(x => x.Id == id);
-}
+}