Integrate pynsist with hatch

[Julian-Held]

When using hatch/hatchling for managing environments and builds, it makes sense to integrate the build of the windows installers.

Building is currently done by manually updating the config file pynsist.cfg and then executing pynsist pynsist.cfg.

Current idea:
Have a script that builds the requirements, the toolbox wheel (hatch build -t wheel) and then calls pynsist from a python script (takluyver/pynsist#127 (comment)). We should also automate the list of pypi wheels to include from the direct dependencies listed in pyproject.toml (pynsist needs the complete dependency tree instead of only direct dependencies).

Once that works, I will also re-visit packaging for Linux. Not having a proper wheel was one of the blockers there, if I remember correctly.

[Julian-Held]

First part is implemented in commit 1201525.

We now have a build script that is called when running
hatch build -t custom
or manually as
python build-exe.py
In both cases, hatch build -t wheel is required first.

I also found out that NSIS is supported on linux, so that automatic building via github actions is likley possible.
Thus, as an todo:

• build debs
• automatic builds via github actions