[app-wiring-refactor]: Remove static initialisation

- Remove all enum static managers
- Introduce interfaces for the managers
- Define new application wiring class (`ManagerFactory`)
- Externalise the configuration

Mage.Server/src/main/java/mage/server/managers/IThreadExecutor.java

@@ -0,0 +1,16 @@
+package mage.server.managers;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.ScheduledExecutorService;
+
+public interface IThreadExecutor {
+    int getActiveThreads(ExecutorService executerService);
+
+    ExecutorService getCallExecutor();
+
+    ExecutorService getGameExecutor();
+
+    ScheduledExecutorService getTimeoutExecutor();
+
+    ScheduledExecutorService getTimeoutIdleExecutor();
+}