retire static TickSpeed. Use Server and Client synchronization agents.

src/main/java/carpet/mixins/ClientLevel_tickSpeedMixin.java

@@ -0,0 +1,28 @@
+package carpet.mixins;
+
+import carpet.fakes.ClientLevelInterface;
+import carpet.helpers.TickRateManager;
+import net.minecraft.client.multiplayer.ClientLevel;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(ClientLevel.class)
+public class ClientLevel_tickSpeedMixin implements ClientLevelInterface
+{
+
+    private TickRateManager tickRateManager;
+
+    @Inject(method = "<init>", at = @At("RETURN"))
+    private void onInit(CallbackInfo ci)
+    {
+        this.tickRateManager = new TickRateManager();
+    }
+
+    @Override
+    public TickRateManager getTickRateManager()
+    {
+        return tickRateManager;
+    }
+}