Add minimum workflow for testing

Author: Blackhex

.github/workflows/main.yml

@@ -0,0 +1,17 @@
+name: Build toolchain
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+permissions: write-all
+
+jobs:
+  trigger-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - run: echo "Hello World"