feat: dedupe the vue in client bundle by default

Fixes vitejs#2443
Fixes vitejs#7454

It's already been set by default in Nuxt 3 for a while now nuxt/framework#6735
So I think this change should be harmless.
And technically it could be considered a fix than a feat.

Nevertheless, it's better to ship it in v4 to minimize disruptions on
the user side.

Things that are not covered in this PR:
1. SSR, because `resolve.dedupe` doesn't work for ESM build outputs, and
the CommonJS version is kinda hacky, I think it's better to skip the
config for SSR completely. Besides, most related issues are from the
client side.
2. #5958 isn't fixed by this PR.

packages/plugin-vue/src/index.ts

@@ -128,6 +128,9 @@ export default function vuePlugin(rawOptions: Options = {}): Plugin {
 
     config(config) {
       return {
+        resolve: {
+          dedupe: config.build?.ssr ? [] : ['vue']
+        },
         define: {
           __VUE_OPTIONS_API__: config.define?.__VUE_OPTIONS_API__ ?? true,
           __VUE_PROD_DEVTOOLS__: config.define?.__VUE_PROD_DEVTOOLS__ ?? false