HDMI-CEC component

[johnboiles]

Description:

Adding docs for the new HDMI-CEC component: https://github.com/esphome/esphome/pull/3017

Checklist:

• [x] Branch: next is for changes and new documentation that will go public with the next ESPHome release. Fixes, changes and adjustments for the current release should be created against current.
• [x] Link added in /index.rst when creating new documents for new components or cookbook.

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[johnboiles]

I think the failure on the last commit is flakiness in netlify

[github-actions[bot]]

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.

[johnboiles]

Still hoping to get some time to clean this up soon!

[github-actions[bot]]

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.

[johnboiles]

Discussion still happening in the main PR

[github-actions[bot]]

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.

[johnboiles]

Thank you @nagyrobi

[github-actions[bot]]

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.

[nagyrobi]

The PNG is too big, use this one instead:

[nagyrobi]

The doc needs an explanation about how to use the hdmi_cec.send automation

            - hdmi_cec.send:
                destination: 0x0
                data: [ 0xC1 ]

what are the destinations etc.