fix: handle malformed JSON in workspace package.json files gracefully

readPackageJson now catches SyntaxError from malformed JSON and returns
an empty object instead of crashing. This prevents workspace discovery
from aborting when a subdirectory has an invalid package.json.

Previously, a broken package.json in any workspace subdirectory would
crash the entire scan with an unhandled SyntaxError.

Co-authored-by: Aiden Bai <aidenybai@users.noreply.github.com>

Author: cursoragent

packages/react-doctor/src/utils/read-package-json.ts

@@ -5,6 +5,9 @@ export const readPackageJson = (packageJsonPath: string): PackageJson => {
   try {
     return JSON.parse(fs.readFileSync(packageJsonPath, "utf-8"));
   } catch (error) {
+    if (error instanceof SyntaxError) {
+      return {};
+    }
     if (error instanceof Error && "code" in error) {
       const { code } = error as { code: string };
       if (code === "EISDIR" || code === "EACCES") {