docs Voltage Protocol and SFM page

[dinboyko]

https://ionique.readthedocs.io/en/latest/data_input.html#loading-an-edh-file
Suggestion for the code example:

Either add a new line for OPTreader or add a note that to make the code above to work, the voltage_compress must be "False"

SFM section:

"affector_table" suggestion:
Add example of usage and the format of what this table contains.

[a-fa]

Addressed the split_voltage_steps confusion by making it clear that this only happens in the backend when voltage_compress = True , and showed an example of how it handles some arbitrary voltage array.