Make parsing configuration files a plugin

[R1kaB3rN]

Closes #37

This PR separates the config file functionality as a plugin from the core program to make it run on some distributions (e.g. Ubuntu LTS). tomllib will be dynamically imported, optional and in the event the user tries to use the --config flag, an error will be raised to warn them of the Python requirement.

cc @loathingKernel for the Github Action

[loathingKernel]

That was fast! I would suggest to add all versions from 3.7 onwards since lutris supports them.

[R1kaB3rN]

That was fast! I would suggest to add all versions from 3.7 onwards since lutris supports them.

We could test that far, but is it fine to use Lutris as our baseline? They must have different requirements to test that far

[loathingKernel]

We could test that far, but is it fine to use Lutris as our baseline? They must have different requirements to test that far

Since lutris uses ulwgl i would say yes. We lose nothing doing it anyways. Better be safe.

[R1kaB3rN]

We could test that far, but is it fine to use Lutris as our baseline? They must have different requirements to test that far

Since lutris uses ulwgl i would say yes. We lose nothing doing it anyways. Better be safe.

While we have nothing to lose, I don't quite agree with that logic and would prefer that we have more precise reasons for testing that far

Also, if we really want to decisively solve this problem, we have the Flatpak to bundle dependencies that will cover not only Python, but Mesa and Vulkan which DXVK has hard minimum requirements for. But luckily, Jammy sources the minimum Mesa for to use DXVK for gaming to not be a big problem for those users

[loathingKernel]

But luckily, Jammy sources the minimum Mesa for to use DXVK for gaming to not be a big problem for those users

Imho the Mesa version requirement for DXVK is irrelevant. Someone might choose to use the OpenGL renderer for whatever reason, or install and use things like gallium nine (I have not tested that option with Proton but you get the point). Someone else might want to chip in here though.