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.

Simplified variable-size array macros

EEPROM Checksum

Tab to Space

Unconditional do_probe_raise() in probe_pt()

If Z_RAISE_BETWEEN_PROBINGS is null or undefined the probe is currently not raised by home_offset[Z_AXIS] and zprobe_zoffset.
But when different from 0 is.

If an undefined Z_RAISE_BETWEEN_PROBINGS expands to 0 (and it does) this is the solution.


A similar asymmetry exists with the newly introduced 'short-cut' in G28 - but its the rise before anything is probed - so should not make a difference.

Do interpolated moves for Allen Key deploy/stow

Allow wait-for-cooling, break at threshold or if cooling stalls

Support for VIKI2 in RAMPS and derivatives

Cleanup extruder runout configs

Always define temp sensor, heater pins for RUMBA

Reduce storage requirements for strings, make some PGM

Rigidbot V2 support - has MCP4728 digipot

Simplify dock_sled() and some more probe tweaks

`dock_sled()` is never called with offset parameter - remove it.
We move x only - so only that needs to be homed. Consequence is - we can home to z-min now with a sled probe!
Feedrates are set and restored in `do_blocking_move()`.
We already checked if the probe is deployed/stowed in deploy/stow_probe.
```
if (z_loc < _Z_RAISE_PROBE_DEPLOY_STOW + 5) z_loc = _Z_RAISE_PROBE_DEPLOY_STOW;
```
makes no sense - remove.
Now the raise is the same for deploy/stow -> move before the if.
Replace the if with a ternary.
Instead writing LOW/HIGH use the boolean `stow` we already have.

There is no reason for not using the sled probe in G29/M48 with 'E'.
It takes a while but works. (tested!)

CARTESIO_UI has lcd contrast

Use Z_RAISE_BETWEEN_PROBINGS with MBL

Combine Z raise before/after options

Ensure a minimum height before XY move in probe_pt

Fix up delays in ST7920_SWSPI_SND_8BIT