Helper methods to build command binding expressions

[tomasherceg]

The bindingCompilationService.Cache already had methods to build value and staticCommand bindings.
I have added methods for creating command bindings as well.

Does resource binding also make sense here?

[exyi]

I'd also include the methods for Resource bindings.

The reason why these methods aren't currently present is that command and resource binding can be created from a plain System.Func, without the need for JS translation.