fix: the license may be an object (#587)

有些 package 的 license 是个对象，会导致 es 写入失败
#585 (comment)


![image](https://github.com/cnpm/cnpmcore/assets/13284978/4343a1e8-1fa5-4aed-950d-d5038534dad8)

app/core/service/PackageSearchService.ts

@@ -67,7 +67,7 @@ export class PackageSearchService extends AbstractService {
       keywords: manifest.keywords || [],
       versions: Object.keys(manifest.versions),
       description: manifest.description,
-      license: manifest.license,
+      license: typeof manifest.license === 'object' ? manifest.license?.type : manifest.license,
       maintainers: manifest.maintainers,
       author: formatAuthor(manifest.author),
       'dist-tags': manifest['dist-tags'],

app/repository/PackageRepository.ts

@@ -51,7 +51,7 @@ export type PackageJSONType = CnpmcorePatchInfo & {
     url?: string;
     email?: string;
   };
-  license?: string;
+  license?: LicenseType | string;
   author?: AuthorType | string;
   contributors?: ContributorType[] | string[];
   maintainers?: ContributorType[] | string[];
@@ -131,6 +131,11 @@ export type AuthorType = {
   url?: string;
 };
 
+type LicenseType = {
+  type: string;
+  url: string;
+};
+
 type ContributorType = {
   name?: string;
   email?: string;