Feature suggestion: Automating wrapping markdown at 80 characters

[dstansby]

Is Your Feature Request Related to a Problem? Please Describe

Add an automated way to wrap markdown files at 80 (@dstansby: maybe a bit more??) characters.

Suggested by @paddyroddy in #335 (comment).

Describe the Solution You'd Like

An automated way to wrap markdown files in the pre-commit config.

Describe Alternatives You've Considered

No response

Additional Context

No response

[paddyroddy]

Identified in #361 proseWrap broke things due to prettier/prettier#9232. This might be fixable by a different markdown parser, or not using the RST-like hyperlink format.