feat(gui): add MobileGui skeleton + opt-in dispatcher (Phase 2-A of #572)#581

takaokouji merged 1 commit into

developsmalruby/smalruby3-editor:developfrom

fix/issue-572-phase-2a-mobile-gui-skeletonsmalruby/smalruby3-editor:fix/issue-572-phase-2a-mobile-gui-skeletonCopy head branch name to clipboard