abstract classes used in unity (#56)

* abstract classes used in unity

* add backward compatibility docs

Author: vu-luong

README.md

@@ -100,6 +100,12 @@ while(true)
 }
 ```
 
+# Backward compatibility
+- **v1.1.4-unity**: all classes extending MonoBehaviour have been made abstract. To use these classes in
+a Unity project, it is necessary to generate concrete classes that inherit from these abstract classes and
+subsequently attach them to the desired Unity components. E.g., `EzyDefaultController`, `EzyEventProcessor`,
+`EzyUnityLoggerFactory`, `EzySocketConfigHolderVariable`, and `EzySocketConfigVariable`.
+
 # Used By
 
 1. [hello-csharp](https://github.com/tvd12/ezyfox-server-example/tree/master/hello-csharp)

unity/EzyDefaultController.cs

@@ -9,7 +9,7 @@
 
 namespace com.tvd12.ezyfoxserver.client.unity
 {
-	public class EzyDefaultController : MonoBehaviour
+	public abstract class EzyDefaultController : MonoBehaviour
 	{
 		[SerializeField]
 		private EzySocketConfigHolderVariable socketConfigHolderVariable;

unity/EzyEventProcessor.cs

@@ -2,7 +2,7 @@
 
 namespace com.tvd12.ezyfoxserver.client.unity
 {
-	public class EzyEventProcessor : MonoBehaviour
+	public abstract class EzyEventProcessor : MonoBehaviour
 	{
 		private static EzyEventProcessor INSTANCE;
 

unity/EzyUnityLoggerFactory.cs

@@ -4,7 +4,7 @@
 
 namespace com.tvd12.ezyfoxserver.client.unity
 {
-	public class EzyUnityLoggerFactory : MonoBehaviour
+	public abstract class EzyUnityLoggerFactory : MonoBehaviour
 	{
 		[SerializeField]
 		private EzyLoggerLevel loggerLevel = EzyLoggerLevel.INFO;

unity/variable/EzySocketConfigHolderVariable.cs

@@ -2,8 +2,7 @@
 
 namespace com.tvd12.ezyfoxserver.client.unity
 {
-	[CreateAssetMenu]
-	public class EzySocketConfigHolderVariable : EzyScriptableVariable<EzySocketConfigVariable>
+	public abstract class EzySocketConfigHolderVariable : EzyScriptableVariable<EzySocketConfigVariable>
 	{
 	}
 }

unity/variable/EzySocketConfigVariable.cs

@@ -3,8 +3,7 @@
 
 namespace com.tvd12.ezyfoxserver.client.unity
 {
-	[CreateAssetMenu]
-	public class EzySocketConfigVariable : EzyScriptableVariable<
+	public abstract class EzySocketConfigVariable : EzyScriptableVariable<
 		EzySocketConfigVariable.EzySocketConfigModel
 	>
 	{