Add a test script to add a mock Worker (#104394)

Add a script `debug-worker-add.sh` which allows additions of mock
workers to Flamenco. It is useful for testing the UI for larger lists of
worker items.

It assists the development of multi-selection for workers #104395

Reviewed-on: https://projects.blender.org/studio/flamenco/pulls/104394

debug-worker-add.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+curl -v -X 'POST' \
+  'http://localhost:8080/api/v3/worker/register-worker' \
+  -H 'accept: application/json' \
+  -H 'Content-Type: application/json' \
+  -d '{
+  "name": "Test Worker",
+  "secret": "abcdefg",
+  "platform": "Linux",
+  "supported_task_types": ["blender", "ffmpeg", "file-management", "misc"]
+}'