add: orchis-kde, qt6-style-kvantum

[bibelin]

Progress

• Edit packagelist
• Add initial pacscript
• Contact devs
• Add maintainer to pacscript

Notes about orchis-kde

This package exists in Ubuntu, but only for noble and oracular and is outdated. A theme repo doesn't have tags or releases, although new commits appear very rarely, so each new commit can be considered a new release. Ubuntu package uses YYYY-MM-DD version format, so did I.

Notes about qt6-style-kvantum

This package exists in Ubuntu oracular (thus I used this name instead of updating unmaintained kvantum package, which I suppose could be removed if such operation could be done in this repo: if there still are packages that depend on it, qt5-style-kvantum | qt6-style-kvantum could be used instead). But required dependencies exist in Debian testing and sid, and in KDE Neon. In Ubuntu repo the package is split in ${pkgname}, ${pkgname}-themes and ${pkgname}-l10n, but I kept everything in one package for user convenience (users probably want l10n anyway, it's just a few Kb, and themes take a few Mb, so I doubt it can be considered a bloat and so I avoided extra work, but if you insist I will make a split package).

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UPD: I see tests failing because of qt5-style-kvantum is installed. I checked that both qt5 and qt6 versions exist in Ubuntu oracular, yet both have /usr/bin/{kvantummanager,kvantumpreview} so they should be in conflict. 🤔 Any suggestions?

[bibelin]

I realized the problem with tests was that qt5-style-kvantum gets installed with orchis-kde because that is its optional dependency, and this blocks installation of qt6-style-kvantum. I will open two separate PRs. Sorry for inconvenience! 🙏