fix: clarify contribution guidelines

CONTRIBUTING.md

@@ -4,3 +4,8 @@ Thank you for contributing to winapps! Before you can contribute, we ask some th
 
 - Please follow our Code of Conduct, the Contributor Covenant. You can find a copy in this repository or under https://www.contributor-covenant.org/
 - All Contributors have to sign [a CLA](https://gist.github.com/oskardotglobal/35f0a72eb45fcc7087e535561383dbc5) for legal reasons. When opening a PR, @cla-assitant will prompt you and guide you through the process. However, if you contribute on behalf of a legal entity, we ask of you to sign [a different CLA](https://gist.github.com/oskardotglobal/75a8cc056e56a439fa6a1551129ae47f). In that case, please contact us.
+- Please follow code conventions enforced by `pre-commit`. To keep down CI usage, please run it locally before committing too.
+  See <https://pre-commit.com> for installation, then run `pre-commit install` inside the `winapps` repository you cloned.
+
+All source code files shall have a valid SPDX-Identifier. For more information, see <https://spdx.dev/learn/handling-license-info/>.
+This identifier will be generated by a pre-commit hook most of the time.

LICENSE.md

@@ -7,7 +7,6 @@ We have tried contacting Fmstrat about this, but they abandoned the project and
 However, almost all parts of the codebase have been rewritten and all new contributions require a Contributor License Agreement ([for individuals](https://gist.github.com/oskardotglobal/35f0a72eb45fcc7087e535561383dbc5), [for legal entities](https://gist.github.com/oskardotglobal/75a8cc056e56a439fa6a1551129ae47f)) to be signed.
 Therefore, the below license is applied to all new contributions made to the project, releasing it into the public domain.
 
-All source code files shall have a valid SPDX-Identifier. For more information, see <https://spdx.dev/learn/handling-license-info/>.
 Refer to a specific file for it's respective license.
 
 ## The Unlicense