Add ability to order systems explicitly.

[waynemwashuma]

Genesis.

While writing systems which need ordering but are for different plugins,an issue arose whereby the plugins need to be registered in order otherwise the systems will be run out of sync with the required order.

Due to this, one needs to know the order of the plugins.
This throws the responsibility to the user to know the order of registering the set of related plugins whilst the plugins should be the ones which order the systems.

Description.

There should be an ability to order how systems run so that responsibility of ordering the systems falls on the plugins which register the systems.

Solution(s).

The App should support applying system ordering when registering systems.

More information.

N/A