netlify-cms

Is your feature request related to a problem? Please describe.
I am using astro's dynamic routing to build up my urls, and it would be really nice if I could add a hidden locale field to my collection so that it appears in the frontmatter. As it stands, it seems the only way to determine a file's locale is from the path/filename, unless I'm missing another option.

**Describe the solutio

Do you have any plans to also process JSON files? That would be really handy!

e.g. I have JSON files in the /data folder that contain absolute paths to images ("/assets/etc.jpg") that, similarly, need to be converted to relative paths.

The About Page of the app should have the following information,

• GitHub Link to this project
• Twitter link to reach out to, https://twitter.com/tapasadhikary
• Blog link to reach out to, http://blog.greenroots.info/
• Website link to reach out to, https://tapasadhikary.com/

Also, the information should be organized correctly.

The Readme file under the code folder is out of the tem