[COMPLIANCE] Add Copyright and License Headers

addons/core/addon/helpers/format-bytes-size.js

@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 import { helper } from '@ember/component/helper';
 import { filesize } from 'filesize';
 

addons/core/addon/helpers/format-time-duration.js

@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 import Helper from '@ember/component/helper';
 import { inject as service } from '@ember/service';
 import DurationUnitFormat from 'intl-unofficial-duration-unit-format';

addons/core/addon/helpers/reverse-indexed-display-name.js

@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 import Helper from '@ember/component/helper';
 import { inject as service } from '@ember/service';