docs(modal): update

docs/app/components/content/examples/modal/ModalProgrammaticExample.vue

@@ -0,0 +1,20 @@
+<script setup lang="ts">
+import { LazyExampleModalComponent } from '#components'
+
+const count = ref(0)
+
+const modal = useModal()
+
+function openModal() {
+  count.value++
+
+  modal.open(LazyExampleModalComponent, {
+    description: 'And you can even provide a description !',
+    count: count.value
+  })
+}
+</script>
+
+<template>
+  <UButton label="Open" color="gray" variant="subtle" @click="openModal" />
+</template>