Added mono test

Author: PathogenDavid

.github/workflows/cache-race.yml

@@ -1,3 +1,6 @@
+# Verdict: The caching service handles this silently
+# The "late" job (Platform B in this case) will quietly print the following message in the post step for actions/cache:
+# > Failed to save: Unable to reserve cache with key test-key, another job may be creating this cache.
 name: Test actions/cache race handling
 on:
   push:

.github/workflows/mono-check.yml

@@ -0,0 +1,22 @@
+name: Mono check
+on:
+  push:
+  workflow_dispatch:
+jobs:
+  run:
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - name: macOS 13 x64
+            os: macos-13
+          - name: macOS 14 aarch64
+            os: maxos-14
+          - name: macOS 15 aarch64
+            os: macos-15
+    name: Test ${{matrix.platform.name}}
+    runs-on: ${{matrix.platform.os}}
+    steps:
+      - run: |
+          mono &
+          fuser /usr/libexec/rosetta/runtime