Add minimum support for static credential stores to admin UI (#1145)

* cred store read ability

* filter out static cred stores and credentials from credential libraries

* chore: 🤖 finish up minimum static cred store support

Co-authored-by: dharini <dharini@hashicorp.com>

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

@@ -0,0 +1,16 @@
+import ModelAbility from './model';
+
+/**
+ * Provides abilities for credential store.
+ */
+export default class CredentialStoreAbility extends ModelAbility {
+  // =permissions
+
+  /**
+   * Only "known" credential store types may be read.
+   * @type {boolean}
+   */
+  get canRead() {
+    return !this.model.isStatic && this.hasAuthorizedAction('read');
+  }
+}