fix: correct cjs types export

fixes #327

packages/vite-plugin/package.json

@@ -16,7 +16,7 @@
     "url": "git+https://github.com/vuetifyjs/vuetify-loader.git"
   },
   "scripts": {
-    "build": "unbuild && node ../../scripts/patchCJS.mjs",
+    "build": "unbuild && node ../../scripts/patchCJS.mjs && node ../../scripts/patch.d.CJS.mjs",
     "dev": "unbuild --stub"
   },
   "author": "Kael Watts-Deuchar",

scripts/patch.d.CJS.mjs

@@ -0,0 +1,35 @@
+/**
+
+ It converts
+
+ ```ts
+ export { vuePlugin as default };
+ ```
+
+ to
+
+ ```ts
+ export = vuePlugin;
+ export { vuePlugin as default };
+ ```
+ */
+
+import { readFileSync, writeFileSync } from 'node:fs'
+import colors from 'picocolors'
+
+const files = ['dist/index.d.ts', 'dist/index.d.cts']
+
+for (const indexPath of files) {
+  let code = readFileSync(indexPath, 'utf-8')
+
+  const matchMixed = code.match(/\nexport \{ (\w+) as default };/)
+  if (matchMixed) {
+    const name = matchMixed[1]
+
+    code = code.slice(0, matchMixed.index) + `\nexport = ${name};` + code.slice(matchMixed.index)
+
+    writeFileSync(indexPath, code)
+
+    console.log(colors.bold(`${indexPath} d.CJS patched`))
+  }
+}