add auto rev dep check

.github/workflows/revdepcheck.yaml

@@ -0,0 +1,17 @@
+# using template and modified from https://github.com/r-devel/recheck
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+name: Reverse dependency check
+
+jobs:
+  revdep_check:
+    name: Reverse check ${{ inputs.which }} dependents
+    uses: r-devel/recheck/.github/workflows/recheck.yml@v1
+    with:
+      which: most  # strong or most
+      subdirectory: '' #if your package is in a git subdir