v1.2.1

Changelog

• 8e5831c chore: remove legacy demo assets and samplewtg2
• fc8766a ci: deploy new guided UI to GitHub Pages instead of samplewtg2
• 9432202 feat: add WTG2 export/import and URL sharing to guided UI
• 3499e8d feat: add customizable evolution zone labels with Roman numeral boundaries
• 50b3af5 feat: add responsive guided UI for Wardley Map creation
• 72467bb feat: support evolution axis positioning for anchors in WTG2
• 98f2678 fix: allow goreleaser to replace existing release artifacts on re-run
• d7aec58 fix: close SVG encoder before reading buffer in WASM paths
• 7ea7726 fix: enlarge signal and warning icons, fix legend alignment