Add 11 modern color scheme skins for MC

[rafaelvzago]

Summary

• Add 11 contemporary color scheme skins including popular themes like Catppuccin, Gruvbox, Nord, Tokyo Night, and others
• Update Makefile.am to include new skin files in distribution
• Provide modern color options for MC users who prefer contemporary terminal themes

Test plan

• Verify all skins load correctly with mc -S <skin-name>
• Test color rendering in different terminal environments
• Confirm Makefile.am includes all new skin files for proper distribution
• Validate skin syntax and color definitions

New skins added

• catppuccin.ini (mocha variant)
• catppuccin-latte.ini (light variant)
• everforest.ini
• gruvbox.ini
• kanagawa.ini
• matte-black.ini
• nord.ini
• osaka-jade.ini
• ristretto.ini
• rose-pine.ini
• tokyo-night.ini

[mc-worker]

Please remove *.po files from your commit. po-files are updated from Transifex.

[rafaelvzago]

Thanks for you review. Changes made under: 83c0e96

[zyv]

First of all, thank you for the contribution! Cheers to Jindrich N. if you happen to work with him :)

I haven't tried these skins live, but I have checked them quickly for non-contrast colors with our new skin browser:

https://skins.midnight-commander.org

I would otherwise complain about the colors, because my understanding is that these are color schemes that are used like that in other software and people like them, so they should be taken as is. But invisible text somehow I think it better be addressed.

I think most skins are unproblematic, but I have found two exceptions. Could you please find a tweak that works?

catppuccin-latte

catppuccin

Also, a general question: you have added a test plan in the PR. Did you actually perform it?

[zyv]

It seems that all the files are missing a trailing newline, whereas all our skins consistently have it. We don't have a linter for this, but I would appreciate it if you could fix it for consistency.

[zyv]

By convention, all our 256-color skins are named something256.ini to make it possible to have fallback non-256 versions and possibly boosted 16M versions of the same general scheme.

I think it would make sense to stick to this convention, and I would appreciate you renaming the files.

[zyv]

Historically, it is so that our 256+ color skins use "fancy" characters for rendering (see, e.g. yadt256.ini for an example of a "thin" skin - that is one not using the double lines) instead of normal terminal characters because it is assumed that if the terminal can display 256 colors, it also must be able to display UTF-8.

I think it would make sense to stick to this pattern for these color schemes unless you want to design something special for them.

What do you think?