Fixes #415. Colors: OpenSUSE - The native method "COLOR_PAIRS" does not exist

[BDisp]

Fixes #415 - Opensuse doesn't work with the libncurses6 and the workaround is install the libncurses5 (with the command sudo zypper install libncurses5) and Terminal.Gui will load it at run. I also added a Dockerfile with a opensuse/tumbleweed image. After build the image, write on a terminal docker run -it uicatalog to run a GUI.

Pull Request checklist:

• I've named my PR in the form of "Fixes #issue. Terse description."
• My code follows the style guidelines of Terminal.Gui - if you use Visual Studio, hit CTRL-K-D to automatically reformat your files before committing.
• My code follows the Terminal.Gui library design guidelines
• I ran dotnet test before commit
• I have made corresponding changes to the API documentation (using /// style comments)
• My changes generate no new warnings
• I have checked my code and corrected any poor grammar or misspellings
• I conducted basic QA to assure all features are working

See bellow in the status bar OS: opensuse-tumbleweed 20230714: