Implement GHWorkflow and GHWorkflowRun

Most of the actions are implemented but not all.
Looks like a good first step.

pom.xml

@@ -409,6 +409,12 @@
       <version>4.13.2</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.awaitility</groupId>
+      <artifactId>awaitility</artifactId>
+      <version>4.0.3</version>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>