add alias @mui/plugin-rtl for regressions

Author: siriwatknp

test/regressions/vite.config.mts

@@ -53,6 +53,7 @@ export default defineConfig({
       '@mui/utils': path.resolve(WORKSPACE_ROOT, './packages/mui-utils/src'),
       '@mui/material-nextjs': path.resolve(WORKSPACE_ROOT, './packages/mui-material-nextjs/src'),
       '@mui/joy': path.resolve(WORKSPACE_ROOT, './packages/mui-joy/src'),
+      '@mui/plugin-rtl': path.resolve(WORKSPACE_ROOT, './packages/mui-plugin-rtl/src'),
       '@mui/internal-docs-utils': path.resolve(
         WORKSPACE_ROOT,
         './packages-internal/docs-utils/src',