Ndk/Components: Added On[Attached|Detached] events

Former-commit-id: 46e5b5720a8496dfe536181918ae0a995e028fc1

SDK/src/NDK/BaseComponent.cpp

@@ -8,6 +8,10 @@ namespace Ndk
 {
 	BaseComponent::~BaseComponent() = default;
 
+	void BaseComponent::OnAttached()
+	{
+	}
+
 	void BaseComponent::OnComponentAttached(BaseComponent& component)
 	{
 		NazaraUnused(component);
@@ -18,6 +22,10 @@ namespace Ndk
 		NazaraUnused(component);
 	}
 
+	void BaseComponent::OnDetached()
+	{
+	}
+
 	std::vector<BaseComponent::ComponentEntry> BaseComponent::s_entries;
 	std::unordered_map<ComponentId, ComponentIndex> BaseComponent::s_idToIndex;
 }