Add genericJE/ha-heating-schedule

[genericJE]

Integration

Repo: https://github.com/genericJE/ha-heating-schedule
Release: https://github.com/genericJE/ha-heating-schedule/releases/tag/v0.1.0

What it is

A per-room heating schedule for Home Assistant. Each room gets a Lovelace card with a 24h shared track holding 1–4 dual-handle heating windows; a Python schedule controller writes set_temperature against any climate that accepts it (Better Thermostat, generic_thermostat, MQTT HVAC, native Zigbee TRV climates).

Pre-flight checks

• Public repo with v0.1.0 GitHub release
• manifest.json has domain, name, version, codeowners, documentation, issue_tracker, iot_class (local_polling), config_flow
• hacs.json valid (name, homeassistant: 2024.4.0, render_readme: true)
• README + CHANGELOG present
• MIT licensed
• Brand icons served from custom_components/heating_schedule/brand/ (HA 2026.3 mechanism, since brands-repo PRs for custom integrations are now auto-closed)
• GitHub Actions: hassfest + hacs/action + pytest all passing on main
• 5 tests covering config-flow happy path + setup/unload lifecycle

[hacs-bot]

This PR has the following issues that need to be addressed:

1. Complete all checklist items before submitting. Please check all the required boxes and submit a new PR when ready.

2. Your branch seems out of date. Please update your branch with the latest changes from the base branch.