v3.0.0

Release Notes - 3.0.0

Upgrade notes and migration steps for v3.0.0.

Key actions:

• This release upgrades dev tooling (Vite, Tailwind, TypeScript, Jest) and adds CI.
• If you run builds locally, install Node.js 20+ in WSL or your environment.
• The WordPress plugin expects a Vite manifest; ensure built assets land in dist as before.
• See UPGRADE_TO_V3.md for a step-by-step migration guide.