Implemented Aquacomputer Next Vision coolant temperature reading

[420coupe]

Implemented Aquacomputer Next Vision coolant temperature reading - I was able to decode some of the response using an old visioncli repo as the starting base. There is still a lot of other things that can be decoded from response but 100% certain the current one I'm decoding matches the displayed value for coolant temp on the VISION OLED screen.

Additionally added custom icons for water temp and aio pump, custom icons appear both in the top bar and menu/sub-menu items. Also at first there was no fan speed being displayed until i sudo modprobe nct6775 and also added that command to /etc/modules-load.d/nct6775.conf so it loads on restart.

edited: added example of vitals with components below