* docs: Add simplified installation instructions for lint-staged
Currently, to install and configure lint-staged you'd need to manually install all packaged and modify the `package.json`.
With `mrm` it's done automatically depending on what version of Prettier is installed and specified in project's dependencies.
* docs: Update according to feedback
* Update docs/precommit.md
Co-Authored-By: okonet <okonet@users.noreply.github.com>