Add Option to disable stack

[reeelix]

There should be both a command line parameter (in the category of memory-related command line parameters) and support in the json memory config files to disable the stack entirely.
Any attempt to use push, pop or stackOP may result in an error message (at parsing-time for loaded programs, at runtime for injected custom instructions).

The stack in the tui interface may become invisible if this option is set.

[reeelix]

mind #63 in regards to corrently restricting access rights to the stack

[LMH01]

I will try to come up with a way on how this could be implemented.