* Allow override of soft SPI pins in `pins_*.h`
* Add default case to avoid compiler warning.
* Additional pin definitions for Archim 2.
* Einsy Retro has same timings as Einsy Rambo.

- Makefiles require tabs (not spaces) before shell commands.
- Other indentation can either be space or tabs.

…and change a multi-use "back" menu item.

* Don't react to s2g on TMC2660. False positives
* Init with sensorless probing as well

With default config and `EEPROM_SETTINGS`, saves over 200 bytes of PROGMEM.

Fix #12015

Fix #12004

* Support new TMC library and 32-bit Archim board

- Added IS_MCU flag
  - When IS_MCU flag is 1, AVR compiler will be used
  - When IS_MCU flag is 0, ARM compiler will be used
- Added support for new TMC library
- Added support for a 32-bit Archim board, which could probably be used as a basis for other 32-bit boards.

Co-Authored-By: marcio-ao <marcio@alephobjects.com>

- Use a comma for decimals just in one message has not been a good idea.
- Full comments translation

Prescalers aren't calculated for the given target frequency.
Stepper timer should run at 2 Mhz and temperature timer at 72 Khz.

And set EEPROM_OFFSET to 0, since the historical 100 skipped bytes are never used.