Method to get all commands from the ICommandStore

[JeremyEspresso]

It would be nice to have a method that returns all commands in the command store.

Currently I am using the reflection way as per the samples to retrieve all commands:

Finite.Commands/samples/Console/LineReaderService.cs

Lines 45 to 48 in 773bb4a

	var commandCount = ((List<ICommand>)_commandStore.GetType()
	.GetField("_currentCommands",
	BindingFlags.NonPublic | BindingFlags.Instance)!
	.GetValue(_commandStore)!)

[FiniteReality]

There are multiple ways I could do this:

• Add an optional ICommandStoreWithCount interface which exposes a RegisteredCommandCount property
• DIM a TryGetRegisteredCommandCount method

I'm not entirely sure all command stores would be able to provide a count, which is why I'm thinking of implementing it this way. However, it's entirely possible that I'm wrong and I could just take the breaking change.