Add OpenAPI generator (#18)

Author: dannysheridan

README.md

@@ -35,4 +35,4 @@ To trigger the generators run:
 fern release <version>
 ```
 
-This command currently runs in a GitHub workflow (see [ci.yml](.github/workflows/ci.yml#L32))
+This command currently runs in a GitHub workflow (see [ci.yml](.github/workflows/ci.yml#L32))

fern/api/generators.yml

@@ -16,3 +16,7 @@ release:
         password: ${FERN_MAVEN_TOKEN}
     github:
       repository: ravenappdev/raven-java
+  - name: fernapi/fern-openapi
+    version: 0.0.10
+    github:
+      repository: ravenappdev/raven-openapi