refactor: move npm api to core

Author: zdm

lib/npm.js

@@ -1,6 +1,6 @@
+import NpmApi from "#core/api/npm";
 import { TmpDir } from "#core/tmp";
 import { repeatAction } from "#core/utils";
-import NpmApi from "#lib/npm";
 
 export default class Npm {
     #pkg;