Auto build device images when a new ESPHome version is deployed

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Describe the enhancement

Device image build times takers so long and currently the process is done manually, by the user, in sequence one device after the other and for large setups is very time consuming, to the point that users just don't update unless they have to.

Having a automatic process that builds the device images with the latest ESPHome version, in the background when a new ESPHome version is deployed will save the user a lot of time, the only required action would be to just flash the new image.
Later on, we can even have the user opt-in to auto flash as well, but that is another effort.

I have created PRs for esphome, dashboard and the docs to implement this.

Use cases

New ESPHome version is deployed but the devices do not run the latest firmware. The user has to go over them one by one, trigger a build & flash process to each one and the build takes a long time for each - this can become very time consuming

Visual examples

No response

Anything else?

No response