Improve CPU initial translation speeds (#50)

* Add background translation to the CPU

* Do not use a separate thread for translation, implement 2 tiers translation

* Remove unnecessary usings

* Lower MinCallCountForReJit

* Remove unused variable

ChocolArm64/ATranslatedSubType.cs

@@ -0,0 +1,9 @@
+namespace ChocolArm64
+{
+    enum ATranslatedSubType
+    {
+        SubBlock,
+        SubTier0,
+        SubTier1
+    }
+}