Add vintl global var in docs

apps/docs/plugins/global-vintl.ts

@@ -0,0 +1,19 @@
+export default defineNuxtPlugin((nuxtApp) => {
+  if (process.client && typeof window !== null) {
+    ;(window as any).vintl = nuxtApp.$i18n
+    console.log('~'.repeat(80))
+    console.log('%cHey there! 👋', 'font-size: 1.2rem')
+    console.log(
+      'VIntl controller can be used here through a global `vintl` variable.',
+    )
+    console.log(
+      'Have playing with it! And if you break anything, just refresh the page :P',
+    )
+    if (!process.dev) {
+      console.log(
+        '⚠️ This is a production environment. Message parsing is unavailable.',
+      )
+    }
+    console.log('~'.repeat(80))
+  }
+})