update and configure size-limit

.size-limit.js

@@ -0,0 +1,45 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+'use strict';
+const glob = require('glob');
+const path = require('node:path');
+const fs = require('fs-extra');
+
+const alias = Object.fromEntries(
+  glob('./packages/*/package.json', {sync: true}).flatMap((fn) => {
+    const pkg = fs.readJsonSync(fn);
+    if (!pkg.private) {
+      return Object.entries(pkg.exports).flatMap(([k, v]) => {
+        if (k.endsWith('.js')) {
+          return [];
+        }
+        return [
+          [
+            `${pkg.name}${k.replace(/^\.(\/$)?/, '')}`,
+            path.resolve(path.dirname(fn), 'dist', v.require.default),
+          ],
+        ];
+      });
+    }
+    return [];
+  }),
+);
+
+const extendConfig = {resolve: {alias}};
+const modifyWebpackConfig = (config) => Object.assign(config, extendConfig);
+
+function sizeLimitConfig(pkg) {
+  return {
+    path: alias[pkg],
+    modifyWebpackConfig,
+  };
+}
+
+module.exports = ['lexical', '@lexical/rich-text', '@lexical/plain-text'].map(
+  sizeLimitConfig,
+);