8°C operation mode. How to submit and incorporate with icon?

[andanders]

My Toshiba heat pump has a 8°C operation mode. It is intended for keeping rooms above freezing temperature.
I use the heat pump in a small cabin, to keep the climate above freezing in the winter. AFAIK this feature is pretty common in
Toshiba heat pumps.

None of the Toshiba files has a "8 degrees" mode. Home Assistant GUI doesn't seem to have an icon for it either.

Why bother? because the normal heating system does not go lower than 17 degrees celsius.

Manual with example:
https://www.toshibaheatpumps.com/application/files/4614/8124/4813/Owners_Manual_RAS-10SKVP2-A_RAS-13SKVP2-A_RAS-16SKVP2-A_RAS-10SAVP2-A_RAS-13SAVP2-A_RAS-16SAVP2-A.pdf

Where do I start? I need a pointer to the right files and what to do. I'll figure out the rest.
I have recorded the command with a Broadlink RA4 mini. I want to share it and hopefully even get an appropriate icon in Home Assistant.