mkdocs-material/material/.icons/fontawesome/regular/square-plus.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M64 80c-8.8 0-16 7.2-16 16v320c0 8.8 7.2 16 16 16h320c8.8 0 16-7.2 16-16V96c0-8.8-7.2-16-16-16H64zM0 96c0-35.3 28.7-64 64-64h320c35.3 0 64 28.7 64 64v320c0 35.3-28.7 64-64 64H64c-35.3 0-64-28.7-64-64V96zm200 248v-64h-64c-13.3 0-24-10.7-24-24s10.7-24 24-24h64v-64c0-13.3 10.7-24 24-24s24 10.7 24 24v64h64c13.3 0 24 10.7 24 24s-10.7 24-24 24h-64v64c0 13.3-10.7 24-24 24s-24-10.7-24-24z"/></svg>