docs(modal): update

docs/app/components/example/ExampleModalComponent.vue

@@ -0,0 +1,15 @@
+<script lang="ts" setup>
+const modal = useModal()
+
+defineProps<{
+  count: number
+}>()
+</script>
+
+<template>
+  <UModal :title="`This modal was opened programmatically ${count} times`">
+    <template #footer>
+      <UButton color="gray" label="Close" @click="modal.close()" />
+    </template>
+  </UModal>
+</template>