Add deploy workflow

.github/workflows/deploy.yml

@@ -0,0 +1,22 @@
+# Workflow derived from https://github.com/r-wasm/actions/tree/v1/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+    push:
+      # Only build on main or master branch
+      branches: [main, master]
+    # Or when triggered manually
+    workflow_dispatch: {}
+
+name: Build and deploy wasm R package repository
+
+jobs:
+    # Reads `./packages` for package references to put
+    # into a CRAN-like repository hosted on GitHub pages
+    deploy-cran-repo:
+        uses: r-wasm/actions/.github/workflows/deploy-cran-repo.yml@v1
+        permissions:
+            # To download GitHub Packages within action
+            repository-projects: read
+            # For publishing to pages environment
+            pages: write
+            id-token: write