chore: sponsors & backers [ci skip]

Author: yyx990803

BACKERS.md

@@ -0,0 +1,7 @@
+<h1 align="center">Sponsors &amp; Backers</h1>
+
+Vue.js is an MIT-licensed open source project with its ongoing development made possible entirely by the support of the awesome sponsors and backers listed in this file. If you'd like to join them, please consider [ sponsor Vue's development](https://staging.vuejs.org/sponsor/).
+
+<p align="center">
+  <img src="https://sponsors.vuejs.org/backers.svg">
+</p>

README.md

@@ -20,3 +20,11 @@ This is the repository for Vue 3.x.
 Please consult the [Migration Guide](http://v3-migration.vuejs.org/).
 
 Also note: Vue 3 does not support IE11 ([RFC](https://github.com/vuejs/rfcs/blob/master/active-rfcs/0038-vue3-ie11-support.md) | [Discussion](https://github.com/vuejs/rfcs/discussions/296)).
+
+## Sponsors
+
+Vue.js is an MIT-licensed open source project with its ongoing development made possible entirely by the support of these awesome [backers](https://github.com/vuejs/core/blob/main/BACKERS.md). If you'd like to join them, please consider [ sponsor Vue's development](https://staging.vuejs.org/sponsor/).
+
+<p align="center">
+  <img src="https://sponsors.vuejs.org/sponsors.svg">
+</p>