Icu 12782 add filtering pagination support for credential stores (#2212)

* feat: 🎸 add filtering & pagination support for credential-store

✅ Closes: https://hashicorp.atlassian.net/browse/ICU-12782

---------

Co-authored-by: Zhihe Li <zhihe.li@hashicorp.com>

addons/api/addon/models/credential-store.js

@@ -6,7 +6,13 @@
 import GeneratedCredentialStoreModel from '../generated/models/credential-store';
 import { equal } from '@ember/object/computed';
 
-export const types = ['static', 'vault'];
+export const TYPE_CREDENTIAL_STORE_STATIC = 'static';
+export const TYPE_CREDENTIAL_STORE_VAULT = 'vault';
+
+export const TYPES_CREDENTIAL_STORE = Object.freeze([
+  TYPE_CREDENTIAL_STORE_STATIC,
+  TYPE_CREDENTIAL_STORE_VAULT,
+]);
 
 export default class CredentialStoreModel extends GeneratedCredentialStoreModel {
   // =attributes