- add first draft of lifestyle wiki

Lifestyles.md

@@ -1 +1,17 @@
-There are multiple Lifestyles available.
+There are multiple lifestyles available. These are needed for the registration of your classes. Depending on their lifestyle it is decided which instance is returned once you resolve it.
+
+The following documentation is supposed to help you decide, which `Lifestyle` you want to use for your need.  
+The lifestyles are part of the enum `Lifestyle`.
+
+## `Lifestyle.Transient`
+
+Using the `Transient`-Lifestyle, a new instance gets created every time an instance is resolved.  
+`Transient` instances are not tracked by the `IocContainer`, so once you don't need them anymore they can be claimed by the garbage collector without leaking memory.  
+This is the default `Lifestyle` that the [[`RegistrationFactory`|RegistrationFactory]] uses.
+
+## `Lifestyle.Singleton`
+
+The `Singleton`-Lifestyle is used to always get the same instance every time an instance is resolved.  
+This is specifically useful if you have a service that needs to be accesses by multiple components of your application.
+
+## `Lifestyle.Multiton`