New codesharing section

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit d9c9e0f):

https://gitlive-docs--pr90-new-codesharing-sect-jdt61dro.web.app

_{(expires Fri, 03 Dec 2021 12:07:18 GMT)}

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[Steakeye]

👍🏽 LGTM