v1.11.0 — Swedish translation

Added

• Swedish translation of the integration (config flow, entity names), contributed by @Svardsten53 in #4. The card's own UI strings still fall back to English for Swedish users.
• tests/test_translations.py — every translations/*.json must parse, carry exactly the key set of en.json and hold no empty strings. Hassfest already rejects a file that is not valid JSON; it passes one that parses but has drifted (a renamed key, an empty string), which is the gap this test closes.

Fixed

• sv.json was missing its closing brace and could not be parsed — repaired on merge.

Full changelog: CHANGELOG.md