[#389] Add media.settings.yml to config folder

[alexsenatore]

Fix for the issue https://github.com/contentacms/contenta_jsonapi/issues/389

• [x] Ready for review
• [ ] Ready for merge

Notes

Missing media.settings.yml cause an error during the installation of Video Embed Media module.

Test Instruction

Before the application of PR

1. Install ContentaCMS with composer run-script install:with-mysql
2. Go To Extend -> Install New Module and install Video Embed Media Output: An error is returned during the installation

After the application of PR Step 2 is completed successfully without error

[alexsenatore]

Hi @e0ipso, I updated the description with the link to the issue and instruction on how to reproduce it