fix: set files on runtime-tools pkg (#3889)

Co-authored-by: Cursor Agent <[email protected]>

Author: ScriptedAlchemy

.changeset/tidy-foxes-fix.md

@@ -0,0 +1,8 @@
+---
+"@module-federation/runtime-tools": patch
+---
+
+fix: add files property to package.json to exclude build config from npm publish
+
+Fixes #3873 where .swcrc file was being published to npm causing Jest test failures.
+Only dist/ and README.md will now be included in the published package.

packages/runtime-tools/package.json

@@ -12,6 +12,10 @@
     "url": "https://github.com/module-federation/core/",
     "directory": "packages/runtime-tools"
   },
+  "files": [
+    "dist/",
+    "README.md"
+  ],
   "publishConfig": {
     "access": "public"
   },