v0.4.0

What's Changed

• feat: UI/UX improvements — player customization, 3D meld rendering, control panel, and game analysis API by @smly in #150
• refactor: make riichienv-ui a reusable embeddable component by @smly in #146
• fix: apply highlight overlay to side faces of 3D tiles (#133) by @smly in #147
• fix(ui): fix kan tile display and improve 3D tile rendering for face-down tiles by @smly in #149
• chore: bump version to 0.4.0 by @smly in #151

Full Changelog: v0.3.7...v0.4.0