Add async_remove_config_entry_device function

[ludeeus]

Closes #4600

[Copilot]

Pull Request Overview

Adds a new function to remove HACS config entries from devices, with validation and error handling, addressing issue #4600.

• Imported HomeAssistantError and DeviceEntry to support new removal logic.
• Switched legacy comment markers from ## to # for consistency.
• Implemented async_remove_config_entry_device to validate identifiers and prevent removal of core or downloaded repositories.

Comments suppressed due to low confidence (2)

custom_components/hacs/init.py:249

• [nitpick] The error message refers to "service", but this function is removing config entries from devices. Consider rephrasing to "Cannot remove config entry from device {device_entry.id}, no valid HACS repository identifier found." for clarity.

            f"Cannot remove service {device_entry.id}, no valid HACS repository identifier found."

custom_components/hacs/init.py:234

• This new function has multiple conditional branches and currently lacks tests. Please add unit tests covering cases such as missing identifiers, system ID checks, downloaded repositories, and successful removal.

async def async_remove_config_entry_device(