include generated API report file to version control

Signed-off-by: Colton Padden <colton.padden@fastmail.com>

plugins/apache-airflow/api-report.md

@@ -0,0 +1,25 @@
+## API Report File for "@backstage/plugin-apache-airflow"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+/// <reference types="react" />
+
+import { BackstagePlugin } from '@backstage/core-plugin-api';
+import { RouteRef } from '@backstage/core-plugin-api';
+
+// Warning: (ae-missing-release-tag) "ApacheAirflowPage" is exported by the package, but it is missing a release tag (@alpha, @beta, @public, or @internal)
+//
+// @public (undocumented)
+export const ApacheAirflowPage: () => JSX.Element;
+
+// Warning: (ae-missing-release-tag) "apacheAirflowPlugin" is exported by the package, but it is missing a release tag (@alpha, @beta, @public, or @internal)
+//
+// @public (undocumented)
+export const apacheAirflowPlugin: BackstagePlugin<
+  {
+    root: RouteRef<undefined>;
+  },
+  {}
+>;
+```