feat: Implement create dynamic fields API endpoint

packages/backend/test/mocks/rest/api/v1/steps/create-dynamic-fields.js

@@ -0,0 +1,36 @@
+const createDynamicFieldsMock = async () => {
+  const data = [
+    {
+      label: 'Bot name',
+      key: 'botName',
+      type: 'string',
+      required: true,
+      value: 'Automatisch',
+      description:
+        'Specify the bot name which appears as a bold username above the message inside Slack. Defaults to Automatisch.',
+      variables: true,
+    },
+    {
+      label: 'Bot icon',
+      key: 'botIcon',
+      type: 'string',
+      required: false,
+      description:
+        'Either an image url or an emoji available to your team (surrounded by :). For example, https://example.com/icon_256.png or :robot_face:',
+      variables: true,
+    },
+  ];
+
+  return {
+    data: data,
+    meta: {
+      count: data.length,
+      currentPage: null,
+      isArray: true,
+      totalPages: null,
+      type: 'Object',
+    },
+  };
+};
+
+export default createDynamicFieldsMock;