Repository metadata: add HACS-compatible topic

[NikaSir]

Why

HACS validates that the GitHub repository has at least one repository topic. The current GitHub connector used to bootstrap this repository does not expose a repository-topic mutation.

Required action

Add at least one relevant GitHub repository topic, for example:

• home-assistant
• hacs
• starline
• vehicle-telemetry

Then remove ignore: topics from .github/workflows/hacs.yaml and confirm the HACS Action passes without ignores.

Acceptance criteria

• repository has relevant topics;
• HACS Action passes with no ignored checks;
• issue can be closed.