QMK Keyboard configuration to uses with the forked QMK code of Michał Szczepaniak ( https://github.com/Michal-Szczepaniak/qmk_firmware/tree/add-touchpad ). Thanks to him, Arya and MPartel.
For thoses like me that own a RP2040 controller created by Arya ( https://www.tindie.com/products/crimier/framework-input-cover-controller/ ) : Hold the « c » key of the keyboard while you plug it. A new connected drive should appear, paste the file .uf2 inside The drive should disconnect and the keyboard + touchpad should works
Clone the QMK fork of Michał Szczepaniak ( https://github.com/Michal-Szczepaniak/qmk_firmware ) => git clone https://github.com/Michal-Szczepaniak/qmk_firmware
Go the add-touchpad branch => git switch add-touchpad
Fetch the submodules: => git submodule update --init --recursive
Copy my folder framework/ inside keyboards/ folder
Setup your QMK environnement => https://docs.qmk.fm/newbs_getting_started
Build the uf2 for classic ANSI layout : => qmk compile -kb framework/rp2040 -km ansi
Build the uf2 for classic ISO layout : => qmk compile -kb framework/rp2040 -km iso