Return repository in npm package metadata endpoint (#23539)

Close #23444 

Add `Repository` to npm package `Metadata` struct so the `repository` in
`package.json` can be stored and be returned in the endpoint.

Co-authored-by: KN4CK3R <admin@oldschoolhack.me>

modules/packages/npm/creator.go

@@ -223,6 +223,7 @@ func ParsePackage(r io.Reader) (*Package, error) {
 				OptionalDependencies:    meta.OptionalDependencies,
 				Bin:                     meta.Bin,
 				Readme:                  meta.Readme,
+				Repository:              meta.Repository,
 			},
 		}