fix: handle missing name/version in package.json (#151)

* fix: handle missing name/version in package.json

When analyzing monorepos, the root package.json may not have name or
version fields, causing a crash in the analyze command. This adds
fallback values consistent with computeInfo().

* fix: default version to 0.0.0 for valid semver

---------

Co-authored-by: Benjamin Newman <benjaminnewman@Benjamins-Laptop.local>

Author: bjnewman

src/analyze/report.ts

@@ -77,8 +77,8 @@ export async function report(options: Options) {
   );
 
   const stats: Stats = {
-    name: packageFile.name,
-    version: packageFile.version,
+    name: packageFile.name || 'unknown',
+    version: packageFile.version || '0.0.0',
     dependencyCount: {
       production: 0,
       development: 0,