Workspaces, install, and Discord alerts

A few of the pieces teams asked for first are now in the product.

• Discord notifications post new chats, waiting visitors, tickets and ratings to a channel you choose.
• WordPress plugin installs the widget from the plugin screen.
• Install page walks through the snippet and can check that it is on a public page.
• Multiple workspaces let one account switch between the sites it belongs to.
• Delete workspace lets an owner remove a workspace they no longer need.

Planned next: email when a chat is missed, Slack and Telegram alerts, a Shopify app, and AI replies grounded in your site.