✨(frontend) add meeting info side panel with copy functionality

Implement new side panel that provides easy access to meeting information
with copy/paste capabilities. Introduces xs text size to accommodate longer
URLs. Panel includes space for future documentation links about meeting
functionality. Addresses direct user requests for simpler sharing of meeting
details.

src/frontend/panda.config.ts

@@ -397,6 +397,12 @@ const config: Config = {
           lineHeight: '1.25rem',
         },
       },
+      xs: {
+        value: {
+          fontSize: '0.825rem',
+          lineHeight: '1.15rem',
+        },
+      },
       badge: {
         value: {
           fontSize: '0.75rem',