use python 3.13

[cs01]

• I have added an entry to CHANGELOG.md, or an entry is not needed for this change

Summary of changes

• Regenerate requirements.txt
• Update pyinstaller version
• Fix paths to work with new pyinstaller
• Use new version of github's upload artifact (required since v2 fails now)

Test plan

uv python install 3.13

# update $PATH in zshrc
export PATH="$HOME/.local/share/uv/python/cpython-3.13.2-linux-x86_64-gnu/bin/:$PATH"
uv tool install -p 3.13 pip-tools
pip-compile
# install nvm
nox -s lint
nox
nox -s build_executables_linux 

and confirm the built files work:

# pex
./build/executable/gdbgui.pex
# executable
./build/executable/gdbgui_0.15.3.0 

fixes #494