feat: Implement get app actions API endpoint

packages/backend/test/mocks/rest/api/v1/apps/get-actions.js

@@ -0,0 +1,22 @@
+const getActionsMock = (actions) => {
+  const actionsData = actions.map((trigger) => {
+    return {
+      name: trigger.name,
+      key: trigger.key,
+      description: trigger.description,
+    };
+  });
+
+  return {
+    data: actionsData,
+    meta: {
+      count: actions.length,
+      currentPage: null,
+      isArray: true,
+      totalPages: null,
+      type: 'Object',
+    },
+  };
+};
+
+export default getActionsMock;