feat: allow omitting scope prefix for official plugins on vue add

Author: haoqunjiang

packages/@vue/cli-shared-utils/lib/pluginResolution.js

@@ -2,6 +2,17 @@ const pluginRE = /^(@vue\/|vue-|@[\w-]+\/vue-)cli-plugin-/
 const scopeRE = /^@[\w-]+\//
 const officialRE = /^@vue\//
 
+const officialPlugins = [
+  'babel',
+  'e2e-cypress',
+  'e2e-nightwatch',
+  'eslint',
+  'pwa',
+  'typescript',
+  'unit-jest',
+  'unit-mocha'
+]
+
 exports.isPlugin = id => pluginRE.test(id)
 
 exports.isOfficialPlugin = id => exports.isPlugin(id) && officialRE.test(id)
@@ -14,6 +25,9 @@ exports.resolvePluginId = id => {
   if (pluginRE.test(id)) {
     return id
   }
+  if (officialPlugins.includes(id)) {
+    return `@vue/cli-plugin-${id}`
+  }
   // scoped short
   // e.g. @vue/foo, @bar/foo
   if (id.charAt(0) === '@') {