Optolink platform to integrate Viessmann heating units into Home Assistant

[j0ta29]

Description: Monitor and control your Viessmann heating components via an Optolink adapter controlled by ESP microcontroller

Related issue (if applicable): none

Pull request in esphome with YAML changes (if applicable): esphome/esphome#4453

Checklist:

• I am merging into next because this is new documentation that has a matching pull-request in esphome as linked above.
  or

• I am merging into current because this is a fix, change and/or adjustment in the current documentation and is not for a new component or feature.

• Link added in /index.rst when creating new documents for new components or cookbook.

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[jesserockz]

As this is a feature matched with a PR in esphome/esphome, please target your PR to the next branch and rebase.

Thanks
Jesse

[j0ta29]

Thanks @jesserockz for taking my PR into consideration.
I'm not 100% sure that after rebase, retargeting and sync my PR is mature for merging.
Please have a look and let me know.

[jesserockz]

It seems the rebase still has other commits from current it wants to merge into dev. You might need to rebase it interactively locally and remove those commits

[j0ta29]

Sorry for the confusion @jesserockz, but I ran into the git hell. Never did a rebase across a github fork.
Hopefully my PR now contains the right base esphome-docs/next and three commits from my side.

[github-actions]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days. Thank you for your contributions.

[github-actions]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days. Thank you for your contributions.

[adorobis]

Hope this is not forgotten

[github-actions]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days. Thank you for your contributions.

[adorobis]

Hopefully not stale :)

[github-actions]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days. Thank you for your contributions.

[rorso]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days. Thank you for your contributions.

Happy holiday!
I'm confident that it's not stale. Someone is just thinking about what to do next. Right?