Align landing and extension with the new WidePlayer design

[mixon00]

Summary

• refreshed the landing page around the new visual direction and current product messaging
• updated the FAQ, changelog, hero, CTA, and product mockups on the site
• aligned the extension colors, copy, FAQ, manifests, build metadata, and generated icons
• restored build number tracking after the monorepo migration

Testing

• ran the apps/web build
• ran the apps/extension build
• verified release package generation for the extension