Remote transmitter as remote entity in Home Assistant

**Describe the problem you have/What new integration you would like**

I want esphome (ir) transmitter to automatically have a remote entity with all its services available from Home assistant, just like Broadlink Universal Remotes have. If receiver is set up, learn command services should be present as well..

**Please describe your use case for this integration and alternatives you've tried:**

I need to use SmartIR to control my air conditioner from Home Assistant with esphome transmitter but i'm having trouble using "remote_transmitter.transmit_raw" as a service. The AC is not supported by esphome ir climate or Arduino-HeatpumpIR.

**Additional context**

No source files, tests, or entry points are named. Start by clarifying the ESPHome remote_transmitter and Home Assistant integration boundary, including whether receiver support is in scope; done means a defined remote entity exposes the requested transmit services and, when configured, learn-command services.

Written by the indexing model from the issue text.