Character-count in Sanity Studio text field

[mathiazom]

Some text fields, like for SEO, have validation on the number of total characters. It would be nice to provide the content creator with the actual count to give an idea of how far away they are from the limit.

Example:

Screen.Recording.2024-08-22.at.14.14.41.mov

(source: https://www.youtube.com/watch?v=ubxjQnnpS-4&t=53s)

Example for RichText: https://www.linkedin.com/posts/knutmelvaer_i-wanted-a-small-character-count-below-a-activity-7100204622690070528-rvSl?utm_source=share&utm_medium=member_desktop

[mathiazom]

Closed by #529