CLI ROM expansion command behaves unintuitively

[charasyn]

When expanding a ROM through the CLI, in order to get a 6MB expansion, the user must pass exactly the string "true" for the exhi parameter. Any other value will be interpreted as 4MB, which can lead to unintuitive behaviour where the user is passing "exhi" or "True" or some other string which they think should give them a 6MB ROM, but it silently gives 4MB. We should consider issuing an error if an unexpected value is given, or changing it to request the ROM size (4mb or 6mb), and making it clear to the user what the expected values for the parameter are.

[Supremekirb]

I believe the traditional thing to do when passing booleans is use a dash-prefixed parameter, isn't it?

Something like coilsnake_cli expand base.sfc --exhi (or -e) is what I mean.

Alternatively, could have the user explicitly specify to what size they want to expand the ROM, instead of there being an implicit default.