Convert async_setup_platforms to async_forward_entry_setups

Update to fix integration from change in Home Assistant Development

Conversion to Config-Flow

Initial release of Config-Flow.
Custom Wheel installation no longer necessary.
Can be installed with HACS as a custom repository, or manually installed.

Update Readme with custom wheel installation instructions

Small update to add instructions on custom wheel installation.
Hopefully this will be temporary and a Home Assistant will host this as a custom wheel for integrations.

Initial release for configuration.yaml setup

Initial release.
Requires manually installing pyamdgpuinfo wheel from repo inside Home Assistant container.
Configuration is done in yaml - no config flow, planned for future release.