fix(v2): swizzle minor improvements (#3225)

* improve swizzle messages

* docs should allow to swizzle in --typescript

* minor swizzle cli improvements

packages/docusaurus-plugin-content-docs/src/index.ts

@@ -110,6 +110,10 @@ export default function pluginContentDocs(
       return path.resolve(__dirname, './theme');
     },
 
+    getTypeScriptThemePath() {
+      return path.resolve(__dirname, '..', 'src', 'theme');
+    },
+
     extendCli(cli) {
       const command = isDefaultPluginId
         ? 'docs:version'