config_tool: migrate to common config library

[lahm86]

Checklist

• I have read the coding conventions
• I have added a changelog entry about what my pull request accomplishes, or it is an internal change

Description

This moves over to the new config library in libtrx, so we now have only need a minimal solution with the specification, language, graphics etc. The docker entrypoint will first build the common library in the subprojects folder, then build the executable, which has a reference to the release path.

There should be no visual or functional difference in the config tool itself when testing.

[rr-]

Code LGTM. I'm stepping out for the day – Can someone confirm if the config tool is properly bundled in this PR builds, has the icon, and doesn't show console windows when launched? (Mostly thinking about integration with GitHub Actions and Docker here)

[aredfan]

Code LGTM. I'm stepping out for the day – Can someone confirm if the config tool is properly bundled in this PR builds, has the icon, and doesn't show console windows when launched? (Mostly thinking about integration with GitHub Actions and Docker here)

Yes on all 3 counts. I've checked the config tool bundled with win and win-installer.