initial import, >900commits predate this

docs/framework/engine/services.md

@@ -0,0 +1,18 @@
+# Services
+
+`MM::Service`s are the Components that get added to the `MM::Engine`.
+
+They need to extend `MM::Service` (included in `<mm/engine.hpp>`) and implement the following Interface:
+
+* Destructor (since it is virtual)
+* `bool enable(MM::Engine& engine)`
+* `void disable(MM::Engine& engine)`
+
+and optionally
+
+* `const char* name(void)`
+
+Not implementing `name()` does not impact functionality, but it is not good practise.
+
+Update and FixedUpdate callbacks should only be added in `enable()` and should be removed in `disable()`.
+