Includes:
  *firmware version / branch / date.
  *extruder count
  *board information (name, serial details, power supply type)
  *thermistors (names, min/max temperatures)
  *printer statistics (PRINTCOUNTER details)

Thanks to @thinkyhead for contributions.

・Add implimantation of PR #3609 to configuration files of Cartesio
・Standardize macro names

Custom Splash Screen for full graphic displays.

Too complicated for the hitachis without knowing what exactly to display.

On top of #4032
Realisation of an idea from #3996

Init display and show bootscreen later, but init display in `kill()`
to init outputs before the bootscreen delays but being able to display
kill errors.

・Add more "UL" suffix
・Restore removed "UL" suffix

Following up on #3231

Alternative fix to #3149

Include #2892 to fix the isHeating symbol in the extruder graphics

Renamed `WARN_REDUCED_ACCURACY` to `DISABLE_REDUCED_ACCURACY_WARNING`

Changed the condition for blinking from
```
#if ENABLED(WARN_REDUCED_ACCURACY)
```
to
```
#if DISABLED(DISABLE_REDUCED_ACCURACY_WARNING)
```