Add workflow for building Windows installer

[RalfG]

This PR partially addresses #101:

• pyinstaller.spec instructs PyInstaller to freeze mokapot with all its dependencies (including Python) in an executable.
• innosetup.iss instructs InnoSetup to bundle everything in a Windows Installer exe.
• I extended .github/workflows/publish.yml to go through the above two steps and upload the exe as an asset to the release.

What is still needed to fully implement #101:

• Run PyInstaller on macOS
• Find a way to bundle the frozen package into a macOS installer
• Run PyInstaller on Linux (not sure which distros are needed?)
• Find a way to bundle the frozen package into a Linux installer for each distro

I don't have any experience with these open issues, so I leave them open for someone else to tackle.

[codecov]

Codecov Report

Merging #111 (1cc33b2) into main (6725bdc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #111   +/-   ##
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  Coverage   85.36%   85.36%           
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  Files          19       19           
  Lines        1640     1640           
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  Hits         1400     1400           
  Misses        240      240           

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[jspaezp]

Hey there!

IMO linux and mac don't really need an installer, distributing the executable has been good enough in my experience.
I am fixing the actions to allow t his to go though and will check on the mac side of things.

[jspaezp]

https://github.com/jspaezp/mokapot/actions/runs/6710019031/job/18234321059
My local branch fails due to a relative import ... I think we might need to modify that.