[BFW-5918] gui: don't remove trailing zeroes of the Footer's axis value

[puhitaku]

This PR implements the enhancement I proposed in #4042 . I confirmed it works as expected on my Prusa MK4.
I set master as the base branch since other PRs do this. Please switch this if necessary. Thank you!

Changes

• src/gui/footer/footer_item_axis.hpp, footer_item_live_z.cpp: else-if blocks are removed to stop removing trailing zeroes after the decimal point.

Fixes

• Added setuptools to the Holly's dependency
  • Since Python 3.12.3, venv won't pre-install setuptools
  • I used Python 3.12.3 to build the firmware and suffered an error due to the lack of it

[danopernis]

LGTM. I rebased it onto current master branch, turns out we already have the setuptools patch.