Adding support for Home Assistant

[emilywotruba]

Description

Created new custom service for Home Assistant and added documentation.
Allows displaying the name and version of the instance, as well as the count of entities:

Fixes # N/A

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I've read & comply with the contributing guidelines
• I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• I have made corresponding changes to the documentation (README.md).
• I've checked my modifications for any breaking changes, especially in the config.yml file

[netlify]

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[bastienwirtz]

Thanks for your contribution @emilywotruba!
A small issue to fix on the data fetching and we should be good to go.

[emilywotruba]

Thank you for reviewing my request @bastienwirtz. Are your concerns addressed by my new commits?

[bastienwirtz]

Aside from the linting issue, everything looks good @emilywotruba, thanks 🙏