Add basque locale

[planetryan]

Add Basque (eu) translation

This adds a full Basque (Euskara) translation for WG Tunnel:

• app/src/main/res/values-eu/strings.xml
  474/474 translatable UI strings translated (all translatable="false"
  entries correctly excluded per Android convention). Placeholders
  (%s, %d, %1$s, etc.) preserved exactly. WireGuard config-file terms
  (PreUp/PostUp/PreDown/PostDown) left untranslated since they map
  directly to config keys users need to recognize.

• fastlane/metadata/android/eu/
  translated F-Droid/Play Store listing metadata (title.txt kept as
  "WG Tunnel", short_description.txt and full_description.txt
  translated, and markdown formatting preserved).

I tried to use Crowdin, but after using a text editor then submitting the XML felt better to me, so I just decided to submit a PR since its 2k+ strings and crowdin would take me a week versus 3d on xml editor

[Copilot]

Pull request overview

Adds Basque (eu) localization support for WG Tunnel by introducing a complete Basque UI string set and corresponding Fastlane store listing metadata, aligning the app’s UI and storefront presence for the new locale.

Changes:

• Add a new Android resource locale (values-eu) with Basque translations for all UI strings.
• Add Basque Fastlane metadata for store listing (title, short description, full description).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
fastlane/metadata/android/eu/title.txt	Adds Basque-locale store title (kept as “WG Tunnel”).
fastlane/metadata/android/eu/short_description.txt	Adds Basque-locale short store description.
fastlane/metadata/android/eu/full_description.txt	Adds Basque-locale full store description with preserved markdown formatting.
app/src/main/res/values-eu/strings.xml	Adds Basque (eu) Android string resources for the app UI.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.