* Added OTA progress to the example.yaml.
* Updated the changelog for the ota progress support in the example.yaml.
* Implemented front_panel.set_level action for easier control of the slider LEDs.
* Document the newly found per-LED option of the front panel.
* Implement front panel HAL layer support.
* Implement actions for the output component to be able to control the LEDs.
* Updated documentation for 1.18.0 release with external components support.
* Moved example.yaml to the root dir, in line with the recommendations from the ESPHome external components guide.
* Normalized the version numbering for ESPHome references.
* Fixed the styling of the example.yaml references.
Co-authored-by: Maurice Makaay <mmakaay1@xs4all.net>