uikit v0.3.0

• support for display: none
• support for visibility: hidden
• Preview and htmlToCode allow to convert html+css+shadcn+tailwind to uikit code
• expose ref.current.getStyle

Breaking Changes

all breaking changes are made to make uikit more compatible with html/css

• cli now installs into subfolders for each kit to allow mixing kits #27
• property border changed to borderWidth
• property horizontalAlign of text changed to textAlign
• lineHeight is now receive absolute values and percentages instead of multipliers (lineHeight 1.3 changes to "130%")