Adds new integration [fredck/lightener]

[fredck]

Checklist

• I've read the publishing documentation.
• I've added the HACS action to my repository.
• (For integrations only) I've added the hassfest action to my repository.
• The actions are passing without any disabled checks in my repository.
• I've added a link to the action run on my repository below in the links section.
• I've created a new release of the repository after the validation actions were run successfully.

Links

Link to current release: https://github.com/fredck/lightener/releases/tag/v1.0.1
Link to successful HACS action (without the ignore key): https://github.com/fredck/lightener/actions/runs/4573769248
Link to successful hassfest action (if integration): https://github.com/fredck/lightener/actions/runs/4573769255

[hacs-bot]

Your repository is now added to HACS 🎉
Here is a few resources that can be useful:

• HACS Discord If you have questions about HACS this is the best place for it.
• Home Assistant Developer Blog Make sure you stay up to date.
• Home Assistant Devs @ twitter
• HACS @ twitter
• Use this GitHub action to validate your repository with HACS
• Use hassfest to validate your integration with this GitHub Action

You can generate a my link that will take the user directly to your integration inside HACS.

Example:

More variants can be found here