yarn-plugin: api report

Signed-off-by: MT Lewis <mtlewis@users.noreply.github.com>

packages/yarn-plugin/api-report.md

@@ -0,0 +1,11 @@
+## API Report File for "yarn-plugin-backstage"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+import { Plugin as Plugin_2 } from '@yarnpkg/core';
+
+// @public (undocumented)
+const plugin: Plugin_2;
+export default plugin;
+```

packages/yarn-plugin/src/index.ts

@@ -13,9 +13,20 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
+/**
+ * Yarn plugin for resolving package versions based on
+ * a Backstage version manifest.
+ *
+ * @packageDocumentation
+ */
+
 import { Plugin } from '@yarnpkg/core';
 import { BackstageResolver } from './resolver/BackstageResolver';
 
+/**
+ * @public
+ */
 const plugin: Plugin = {
   resolvers: [BackstageResolver],
 };

packages/yarn-plugin/src/resolver/BackstageResolver.ts

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 import {
   structUtils,
   Descriptor,