Tools and Workflows-- Building

[nicolejadeyee]

• Update content for Lit
• Rollup build example may need to be updated for Lit
• Decide if we want to switch to showing usage of @web/rollup-plugin-html and/or pointing to Use @web/rollup-plugin-html to build docs site lit#1609 in starter template (or another template)
• Reconcile with Adds browser support info #117 (comment)