[build][ci] Make things easier with pdm and yowasp

[sporniket]

Technical details

In order to be OS independant, i.e. only relying on python

• Use PDM (see #9 ) with some "scripts" defined in the pyproject.toml file.
• Use yowasp version of yosys/nextpnr (see #6 )

Not OS independant, the deployment to the fpga :

• Provide PDM scripts that call either openfpgaloader, either ecpdap. For each tool, a deploy will install the bitstream in the SRAM (a volatile installation, wiped on power cycle).

Reuse some work I done there : https://github.com/sporniket/amaranth-stuff

[sporniket]

Got an access to a Windows workstation. I tried to MSYS2 to get a python environment :

pacman -S git curl base-devel gcc vim cmake python, python-pip
python3 -m pip install pdm

Result

• twine depends on nh3, that under MSYS2 requires a Rust compiler, and python3 -m pdm sync fails ⇒ for the time being, I removed twine with python3 -m pdm remove -dG build twine
• yowasp-yosys is not supported on this platform ⇒ THE (BAD) END

Next Step

Try without msys2