Two related changes to the translation infrastructure:
1. Add Swedish (sv) as a supported locale in both the CLI and Monitor
translation systems. Inspired by PR #121, which arrived before the
current auto-generated cache layout existed.
2. Include Slovak (sk) in the default auto-fill target set. Guardrail #1
in build_i18n_messages.py never overwrites a key whose target value
differs from EN, so Vaso73's curated Slovak strings stay intact —
auto-translation only fills keys that are still on the English
fallback. Trade-off accepted: sk users see decent machine translation
for new keys immediately instead of raw English while human curation
catches up, and Vaso73 keeps full ownership of the wording via
follow-up PRs.
Changes:
- AppImage/lib/i18n/languages.ts: add "sv" to LanguageCode + register
in SUPPORTED_LANGUAGES.
- AppImage/messages/sv/common.json: stub — will be filled by the i18n
workflow on the local bootstrap.
- .github/scripts/build_translation_cache.py: add "sv" to
DEFAULT_LANGUAGES.
- .github/scripts/build_i18n_messages.py: add "sk" and "sv" to
DEFAULT_LANGUAGES; update comments to explain the sk decision.
- .github/workflows/build-i18n-messages.yml: default input includes
sk + sv; comments updated to match.
