Allow tagging of AREA to entities that go through to the HA frontend

Describe the problem you have/What new integration you would like The ability to set the area not only for the top level physical device, but individually override the area for each and every entities/sensors/etc. So that the device that is in my closet, can accurately reflect the lights and sensors that are located in the living and dining room. I know this can currently be manually modified on the HA side, but it's erased if I ever have to delete and re-add the device.

Please describe your use case for this integration and alternatives you've tried: I have many "large" PCBs that handle multiple IO per PCB that are wired out to many rooms. Currently, ESPHome allows you to configure the area for a device but it assumes that all of the entities associated with that device are in that area.

Additional context Could look something like this:

esphome / feature-requests

Allow tagging of AREA to entities that go through to the HA frontend #2798