🚩 PR: Added icons and shortcuts to context menu

[elsoazemelet]

Closes #771

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit ab2a81e):

https://grid-editor-web--pr779-feat-contextmenu-fwckr2b8.web.app

_{(expires Mon, 29 Jul 2024 15:15:30 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: 2b65ba6ef19c55d367eaffd04e46bcde25305d6f}

[SukuWc]

Had to rework style to match grid-uikit, otherwise functions as expected, ready to merge!