refactor(config): break ui.config.ts into separate files (#930)

src/runtime/ui.config/overlays/contextMenu.ts

@@ -0,0 +1,26 @@
+import arrow from '../_popperArrow'
+
+export default {
+  wrapper: 'relative',
+  container: 'z-20 group',
+  width: '',
+  background: 'bg-white dark:bg-gray-900',
+  shadow: 'shadow-lg',
+  rounded: 'rounded-md',
+  ring: 'ring-1 ring-gray-200 dark:ring-gray-800',
+  base: 'overflow-hidden focus:outline-none relative',
+  // Syntax for `<Transition>` component https://vuejs.org/guide/built-ins/transition.html#css-based-transitions
+  transition: {
+    enterActiveClass: 'transition ease-out duration-200',
+    enterFromClass: 'opacity-0 translate-y-1',
+    enterToClass: 'opacity-100 translate-y-0',
+    leaveActiveClass: 'transition ease-in duration-150',
+    leaveFromClass: 'opacity-100 translate-y-0',
+    leaveToClass: 'opacity-0 translate-y-1'
+  },
+  popper: {
+    placement: 'bottom-start',
+    scroll: false
+  },
+  arrow
+}