Refactored pre spt mod loader to user IOnLoad, moved Watermark to IOnLoad as well (#313)

Co-authored-by: Alex <alex@dm-me-for-questions.com>

Libraries/SPTarkov.Server.Core/DI/IOnLoad.cs

@@ -3,5 +3,4 @@ namespace SPTarkov.Server.Core.DI;
 public interface IOnLoad
 {
     Task OnLoad();
-    string GetRoute();
 }

Libraries/SPTarkov.Server.Core/DI/IOnUpdate.cs

@@ -3,5 +3,4 @@ namespace SPTarkov.Server.Core.DI;
 public interface IOnUpdate
 {
     bool OnUpdate(long timeSinceLastRun);
-    string GetRoute();
 }

Libraries/SPTarkov.Server.Core/DI/OnLoadOrder.cs

@@ -2,15 +2,17 @@ namespace SPTarkov.Server.Core.DI;
 
 public static class OnLoadOrder
 {
-    public const int Database = 0;
-    public const int GameCallbacks = 100;
-    public const int PostDBModLoader = 200;
-    public const int TraderRegistration = 300;
-    public const int HandbookCallbacks = 400;
-    public const int HttpCallbacks = 500;
-    public const int SaveCallbacks = 600;
-    public const int TraderCallbacks = 700;
-    public const int PresetCallbacks = 800;
-    public const int RagfairCallbacks = 900;
-    public const int PostSptModLoader = 1000;
+    public const int Watermark = 0;
+    public const int PreSptModLoader = 1000;
+    public const int Database = 2000;
+    public const int GameCallbacks = 3000;
+    public const int PostDBModLoader = 4000;
+    public const int TraderRegistration = 5000;
+    public const int HandbookCallbacks = 6000;
+    public const int HttpCallbacks = 7000;
+    public const int SaveCallbacks = 8000;
+    public const int TraderCallbacks = 9000;
+    public const int PresetCallbacks = 10000;
+    public const int RagfairCallbacks = 11000;
+    public const int PostSptModLoader = 12000;
 }

Libraries/SPTarkov.Server.Core/DI/OnUpdateOrder.cs

@@ -2,12 +2,7 @@ namespace SPTarkov.Server.Core.DI;
 
 public static class OnUpdateOrder
 {
-    public const int PreSptUpdate = 0;
-    public const int DialogueCallbacks = 1;
-    public const int HideoutCallbacks = 100;
-    public const int TraderCallbacks = 200;
-    public const int RagfairCallbacks = 300;
-    public const int InsuranceCallbacks = 400;
-    public const int SaveCallbacks = 500;
-    public const int PostSptUpdate = 9999;
+    public const int DialogueCallbacks = 1000;
+    public const int HideoutCallbacks = 2000;
+    public const int InsuranceCallbacks = 3000;
 }