Adding Creality V5.2.1 Board to Marlin

[Plyn1x]

Description

Requirements

It requires the Creality V5.2.1

Benefits

Custom and updated fimware for the SV04 may improve print quality and maybe better Toolswapping

Configurations

Config.zip

Related Issues

I and other people where searching to get an the Creality V5.2.1 for their SV04 in Marlin (#24729)

[ils15]

Hello revised pins and compiled firmware without issues

[thisiskeithb]

This:

https://github.com/MarlinFirmware/Marlin/blob/644c91ce8b289e7ff3e67f1af0438e3a32a29558/ini/stm32f1.ini#L471-L474

Conflicts with:

https://github.com/MarlinFirmware/Marlin/blob/644c91ce8b289e7ff3e67f1af0438e3a32a29558/ini/renamed.ini#L28-L30

And causes a "Can not remove temporary directory /Marlin/.pio/build. Please remove it manually to avoid build issues" error when you try to clean your build.