pyproject.toml: don't install docs et al into the wheel

[ArsenArsen]

Description

wheels are directly unpacked into site-packages, so this means likely conflict with other packages

To Do

• Documentation. (If you've added a new command-line flag, for example, find the appropriate page under docs/ to describe it.)
• Changelog. (Add an entry to docs/changelog.rst to the bottom of one of the lists near the top of the document.)
• Tests. (Very much encouraged but not strictly required.)

if a changelog entry is needed, I am happy to add one. tests/docs seem not applicable (as this is purely a packaging issue)

[snejus]

I should have not trusted poetry docs which say that format parameter defaults to sdist 🤡

[snejus]

Well spotted, thanks for this <3

[ArsenArsen]

I should have not trusted poetry docs which say that format parameter defaults to sdist 🤡

heh, they seem to have changed it between versions.. which means one can't rely on it right now

thanks for merging!