Add action class stub

src/Action.ts

@@ -0,0 +1,12 @@
+import { Inputs } from "./Inputs";
+import { Releases } from "./Releases";
+
+export class Action {
+    private inputs: Inputs
+    private releases: Releases
+
+    constructor(inputs: Inputs, releases: Releases) {
+        this.inputs = inputs
+        this.releases = releases
+    }
+}