build: Fix build issues

packages/rsbuild-config/src/dev.ts

@@ -1 +1 @@
-export * from './lib/dev';
+export * from './lib/dev.js';

packages/rsbuild-config/src/index.ts

@@ -1 +1 @@
-export * from './lib';
+export * from './lib/index.js';

packages/rsbuild-config/src/lib/config/index.ts

@@ -1,2 +1,2 @@
-export * from './rsbuild';
-export * from './vitest';
+export * from './rsbuild.js';
+export * from './vitest.js';

packages/rsbuild-config/src/lib/dev.ts

@@ -1 +1 @@
-export * from './config';
+export * from './config/index.js';

packages/rsbuild-config/src/lib/testing.ts

@@ -1 +1 @@
-export * from './config/vitest';
+export * from './config/vitest.js';

packages/rsbuild-config/src/testing.ts

@@ -1 +1 @@
-export * from './lib/testing';
+export * from './lib/testing.js';