Remove "Doorbell" from entity names, change relay to a regular entity

[fernandodeperto]

Because of how Home Assistant creates entities from ESPHome devices, a sensor that in ESPHome is named "Doorbell chime active", when set up with a device simply called "Doorbell", will have its entity named "switch.doorbell_doorbell_chime_active", which is not ideal. By removing "Doorbell" as a prefix for these components, the naming convention inside HA works better.

Secondly, by making the relay component not internal, it can be used with automations for other things. One example is setting up a siren for the alarm integration, or a short beep to indicate something else is wrong, like a water leak sensor, or an AC turned on with an open window/door.

[Commifreak]

Came here for +1 the non-internal relay change. Would be great to simulate a button press to let the doorbell ring from another source.