feat(Modal): open programmatically (#78)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

src/runtime/plugins/modal.ts

@@ -0,0 +1,11 @@
+import { shallowRef } from 'vue'
+import { defineNuxtPlugin } from '#imports'
+import { modalInjectionKey, type ModalState } from '../composables/useModal'
+
+export default defineNuxtPlugin((nuxtApp) => {
+  const modalState = shallowRef<ModalState>({
+    component: 'div',
+    props: {}
+  })
+  nuxtApp.vueApp.provide(modalInjectionKey, modalState)
+})