modify gradient picker design
Modify linear gradient tool
Merge pull request from easylogic/feat/vite-2
move webpack to vite
support linear gradient colorstep ui
support linear gradient line
support color step shortcut, improvement performance
support background image ui
Refactoring UI
Improvement performance
support pretendard font
add createComponent function
redesign inspired by figma
support toolbar menu
update auto layout algorithm, support jest
refactoring..., implement copy and paste
* change build system to vite
support json based editor
support linear gradient colorstep ui
