Updates .gitignore

Delete mysterious .swp files from #3609

Croatian language support

Fix feedrate in gcode_T (max_feedrate is mm/s)

Script to init the upstream remote for Marlin

Follow-up and improvement the PR #4053 (CNControls Cartesio UI Support)

Fix gcode_T

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

Babystepping show millimeters on LCD

CNControls Cartesio UI Support

Adds versioning for Configuration.h & Configuration_adv.h

Fixup position adjustment on toolchange

Introduce save_delay()

Fix for the PR #4023(Add macros to move servos)

RCBugFix with UltraLCD active does not compile

Introduce save_delay() for long delays what otherwise would cause
watchdog resets

Explizit lcd_set_custom_characters(false) at the end of bootscreen().
Else the charset is not proper set in case of LCD_PROGRESS_BAR.

・Add missing ')'

Use "Tn S1" to change tools without moving

Use linear feedrate in gcode_T, not volumetric

Custom Splash Screen

Follow-up the PR #3676(Advance extrusion algorithm – LIN_ADVANCE)

・Update forgotten example configurations

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

Fix broken DISABLE_HEATER macro

Parse M905 args in Marlin_main.cpp

Patch LIN_ADVANCE to use code_value_float

Show bootscreen later

Advance extrusion algorithm – LIN_ADVANCE

Update to language_it.h

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.