Pull Request: https://github.com/php/web-php/pull/973 Author: haszi
Move contribution links to the bottom of the documentation pages, add some styling to make it stand out of the rest of the page and link [one of the contribution READMEs](https://github.com/php/doc-base/blob/master/README.md). This is a minimal implementation of the second item on the [2024 Documentation Roadmap](https://github.com/php/doc-en/issues/3240). Please note that this PR depends on [this](https://github.com/php/phd/pull/114) Phd PR. The rendered contribution section is inserted between the main content and the user notes of each page and currently looks like this: 
