[BUG] - Recipe Actions don't work with Home Assistant due to incorrect content type header

[michael-genson]

First Check

• This is not a feature request.
• I added a very descriptive title to this issue (title field is above this).
• I used the GitHub search to find a similar issue and didn't find it.
• I searched the Mealie documentation, with the integrated search.
• I already read the docs and didn't find an answer.
• This issue can be replicated on the demo site (https://demo.mealie.io/).

What is the issue you are experiencing?

Due to how recipe actions are implemented, we currently send POST actions with the text/plain content type header. This is to get around a CORS preflight issue (since we might not get a response back).

Home Assistant requires using application/json to receive the webhook data. It may be as simple as having the backend do the POST request (instead of the frontend).

Steps to Reproduce

1. Create a recipe POST action
2. Send the request to HA
3. Observe that the content can't be read (https://www.home-assistant.io/docs/automation/trigger/#webhook-trigger)

Please provide relevant logs

N/A

Mealie Version

nightly

Deployment

Docker (Synology)

Additional Deployment Details

No response