Expand @fluentui/react root index file's export *s to uncover and fix duplicate exports.

change/@fluentui-eslint-plugin-ae682cae-04ae-4e42-a4ba-cbf2525ad490.json

@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Updating react-legacy linting to warn on export star usage.",
+  "packageName": "@fluentui/eslint-plugin",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}

change/@fluentui-react-10ceb504-58ea-4967-b2d3-daae2d632740.json

@@ -0,0 +1,7 @@
+{
+  "type": "minor",
+  "comment": "This change removes top-level export * from the index.js of @fluentui/react, which was implicitly exporting duplicates of symbols. Changing to explicit exports means that the export * as the top level barrel file can't introduce duplicate names. This works around an issue identified in esbuild: https://github.com/evanw/esbuild/issues/2658",
+  "packageName": "@fluentui/react",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}

packages/eslint-plugin/src/configs/react-legacy.js

@@ -10,4 +10,13 @@ module.exports = {
     'jsdoc/check-tag-names': 'off',
     '@griffel/no-shorthands': 'off',
   },
+  overrides: [
+    {
+      files: '**/src/index.{ts,tsx,js}',
+      rules: {
+        // TODO: propagate to `error` once all packages barrel files have been fixed
+        '@rnx-kit/no-export-all': ['warn', { expand: 'all' }],
+      },
+    },
+  ],
 };