Get the text of an Assist (Voice Assitant) answer (ex id(tts_text)

### The problem

I would like to be able to get the text of the answer we get after a query to the Atom Echo. Actually, we can get the wav. I also manage to get the text coming from the query i made by voice after STT with the id(stt_text).

It could be something like id(tts_text)

If I try to use id(tts_text) it only gives me the url of the audio file

### Which version of ESPHome has the issue?

2024.5.4

### What type of installation are you using?

Home Assistant Add-on

### Which version of Home Assistant has the issue?

2024.6

### What platform are you using?

ESP32

### Board

ESP32-S3 (Atom Echo)

### Component causing the issue

Voice Assitant i2s

### Example YAML snippet

_No response_

### Anything in the logs that might be useful for us?

_No response_

### Additional information

_No response_