feat(chisel): get last result and assign

[radeksvarz]

Component

Chisel

Describe the feature you would like

It is common that REPL environments have the approach to access the last result (Python having "_", Chrome console having "$_")

It would be ideal if chisel also had that, e.g.:

➜ type(uint256).max
Type: uint
├ Hex: 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
└ Decimal: 115792089237316195423570985008687907853269984665640564039457584007913129639935
➜ uint256 MAX = $_

Ideally such feature would be implemented in the similar way IPython has that:

Input and output history are kept in variables called In and Out, keyed by the prompt numbers, e.g. In[4]. The last three objects in output history are also kept in variables named _, __ and ___.
https://ipython.readthedocs.io/en/stable/interactive/tutorial.html#history

Additional context

No response

[radeksvarz]

Is there any workaround to use instead of copy / paste?