Add additional trigger events to test workflow

The `workflow_dispatch` event trigger allows the workflow to be run manually via the GitHub web interface. This can be
useful to trigger the workflow run in cases where the standard triggers won't, such as testing how external changes
(e.g., actions used in the workflow) affected it.

The `repository_dispatch` event serves a similar purpose, except triggered via the GitHub API.

Author: per1234

.github/workflows/test-typescript-task.yml

@@ -27,6 +27,8 @@ on:
       - "**.jsx"
       - "**.ts"
       - "**.tsx"
+  workflow_dispatch:
+  repository_dispatch:
 
 jobs:
   test: