Add wmctrl CLI as dependency to Python wrapper

[ehfd]

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

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This PR adds the wmctrl (https://packages.debian.org/sid/wmctrl) CLI to this feedstock as a dependency so that this Python wrapper does not depend on the OS package manager.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipe) and found some lint.

Here's what I've got...

For recipe:

• noarch packages can't have selectors. If the selectors are necessary, please remove noarch: python.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[ehfd]

@conda-forge-admin, please rerender

[ehfd]

Followed manuals in https://conda-forge.org/docs/maintainer/knowledge_base/#noarch-packages-with-os-specific-dependencies

[ehfd]

@kynan @sodre Please review.

[ehfd]

@conda-forge-admin, please rerender

[ehfd]

The Python wrapper depends on subprocess calls to wmctrl and xprop.

This PR covers the dependency for wmctrl.

xprop should be eventually covered by: conda-forge/staged-recipes#26241 but is generally bundled within the system.