Add Vantah

[bolikcraft]

Vantah is an unofficial GUI and system-tray front-end for the official adguardvpn-cli command-line tool on Linux. It does not implement a VPN itself and does not bundle any AdGuard software — it runs the CLI as an external process and shows its state in a graphical interface.

• Repository: https://github.com/bolikcraft/vantah
• License: GPL-3.0-or-later
• The AppImage is built for x86-64 in CI on every release and published on the releases page with a .sha256 next to it.
• The AppDir ships a desktop file and an AppStream metainfo file (io.github.bolikcraft.vantah.metainfo.xml).
• Not affiliated with, endorsed by, or sponsored by AdGuard.

[probonopd]

Thank you very much. Can you please default it to International English? Right now it shows text in Cyrillic by default.

[bolikcraft]

Thanks for the review, and sorry for the delay.

Fixed in v0.3.6, released today: the UI now defaults to International English. English is the neutral resource set, so a system with no matching locale (e.g. LC_ALL=C) gets English instead of Cyrillic. Russian became a satellite assembly and is only used when the system locale asks for it, or when the user picks it explicitly in the app.

Verified against the released AppImage on a clean profile with LC_ALL=C LANG=C — all UI text is English.

No change is needed in this PR: data/Vantah points at the repository, so the scanner picks up the latest release.