Adding copilot IVA requests to posting

copilot/posting/README.md

@@ -0,0 +1,17 @@
+# Copilot Event Requests
+
+## Usage
+
+The requests use the [Posting](https://posting.sh/) TUI to run requests.
+Open using the following command:
+
+```bash
+posting --collection copilotux --env int.env
+```
+
+You should run the **Authentication** request to obtain an API access_token
+before using the other requests.
+
+## Environment
+
+copy and update (/example.env) with client_id and client_secret details.