feat(Modal): new component

src/theme/index.ts

@@ -7,6 +7,7 @@ export { default as collapsible } from './collapsible'
 export { default as container } from './container'
 export { default as icons } from './icons'
 export { default as kbd } from './kbd'
+export { default as modal } from './modal'
 export { default as popover } from './popover'
 export { default as skeleton } from './skeleton'
 export { default as tabs } from './tabs'