Allow for cascaded formatters or formatters taking multiple args

[jr1221]

A common usecase is offsetting a variable and multiplying it. (see imd.json HV system) This cannot be done right now as offset and multiply are mutually exclusive and we cannot make an "offset_and_multiply" because we would need to pass two arguments.

Therefore two possible solutions:

• Allow for multiple formatters, be aware of pemdas! Then you can add an offset and a multiply
• Allow for the formatter to take in multiple arguments.