fix(Modal/Popover/Slideover)!: rename prevent-close to dismissible + uniformize docs

src/runtime/components/Modal.vue

@@ -48,10 +48,10 @@ export interface ModalProps extends DialogRootProps {
    */
   closeIcon?: string
   /**
-   * When `true`, the modal will not close when clicking outside.
-   * @defaultValue false
+   * When `false`, the modal will not close when clicking outside or pressing escape.
+   * @defaultValue true
    */
-  preventClose?: boolean
+  dismissible?: boolean
   class?: any
   ui?: Partial<typeof modal.slots>
 }
@@ -85,7 +85,8 @@ const props = withDefaults(defineProps<ModalProps>(), {
   portal: true,
   overlay: true,
   transition: true,
-  modal: true
+  modal: true,
+  dismissible: true
 })
 const emits = defineEmits<ModalEmits>()
 const slots = defineSlots<ModalSlots>()
@@ -96,7 +97,7 @@ const appConfig = useAppConfig()
 const rootProps = useForwardPropsEmits(reactivePick(props, 'open', 'defaultOpen', 'modal'), emits)
 const contentProps = toRef(() => props.content)
 const contentEvents = computed(() => {
-  if (props.preventClose) {
+  if (!props.dismissible) {
     return {
       pointerDownOutside: (e: Event) => e.preventDefault(),
       interactOutside: (e: Event) => e.preventDefault(),