v0.1.1

Re-cut for HACS default submission so the release sits on top of the validated workflow run.

Changes since v0.1.0

• Brand icons served from custom_components/heating_schedule/brand/ (HA 2026.3 mechanism)
• CI: hassfest, HACS, pytest workflow added
• manifest: iot_class corrected to local_polling
• Tests: config-flow + setup/unload lifecycle
• Bug fix: setback entity_id no longer double-prefixed
• Docs: CHANGELOG; README install step prefers HACS default