pipx installation failure fix

[rkollataj]

After successful installation of demu_extended with pipx:

$ pipx install 'git+https://github.com/MarkHedleyJones/dmenu-extended'
  installed package dmenu_extended 1.2.1, installed using Python 3.12.3
  These apps are now globally available
    - dmenu_extended_cache_build
    - dmenu_extended_install_systemd_service
    - dmenu_extended_run

I am getting following error when running it:

$ dmenu_extended_run                                   
Traceback (most recent call last):
  File "/home/remol/.local/bin/dmenu_extended_run", line 5, in <module>
    from dmenu_extended.main import run
  File "/home/remol/.local/pipx/venvs/dmenu-extended/lib/python3.12/site-packages/dmenu_extended/__init__.py", line 1, in <module>
    from .main import *
  File "/home/remol/.local/pipx/venvs/dmenu-extended/lib/python3.12/site-packages/dmenu_extended/main.py", line 7, in <module>
    import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'

The fix adds missing dependency to pyproject.toml.

[MarkHedleyJones]

@rkollataj Thanks for this update! The CI is failing as the version string in pyproject.toml needs updating to 1.2.2. Are you able to take care of that for me on your branch?

[rkollataj]

@MarkHedleyJones Just pushed incremented version. Hope it will be fine now :-)

[MarkHedleyJones]

@rkollataj So sorry for the delay. There are some issues in CI that need fixing, I'll force merge this for now and fix the issues after. Thank you very much for your contribution.