Create and add an icon to the extension. Ref: [VSCode Docs Example](https://code.visualstudio.com/api/references/extension-manifest#example) <!-- Edit the body of your new issue then click the ✓ "Create Issue" button in the top right of the editor. The first line will be the issue title. Assignees and Labels follow after a blank line. Leave an empty line before beginning the body of the issue. -->
