Add typing annotations for rollup config

Author: darinmorrison

editors/code/rollup.config.js

@@ -1,7 +1,10 @@
+// @ts-check
+
 import resolve from '@rollup/plugin-node-resolve';
 import commonjs from '@rollup/plugin-commonjs';
 import nodeBuiltins from 'builtin-modules';
 
+/** @type { import('rollup').RollupOptions } */
 export default {
     input: 'out/main.js',
     plugins: [