add r github workflow

Author: wing328

.github/workflows/samples-r.yaml

@@ -0,0 +1,49 @@
+name: Samples R clients
+
+on:
+  push:
+    paths:
+      - samples/client/petstore/R/**
+  pull_request:
+    paths:
+      - samples/client/petstore/R/**
+jobs:
+  build:
+    name: Build R projects
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sample:
+          # clients
+          - samples/client/petstore/R/
+    services:
+      petstore-api:
+        image: swaggerapi/petstore
+        ports:
+          - 80:8080
+        env:
+          SWAGGER_HOST: http://petstore.swagger.io
+          SWAGGER_BASE_PATH: /v2
+    steps:
+      - uses: actions/checkout@v5
+      - name: Add hosts to /etc/hosts
+        run: |
+            sudo echo "127.0.0.1 petstore.swagger.io" | sudo tee -a /etc/hosts
+      - uses: r-lib/actions/setup-r@v2
+        working-directory: ${{ matrix.sample }}
+        with:
+          use-public-rspm: true
+
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        working-directory: ${{ matrix.sample }}
+        with:
+          extra-packages: any::rcmdcheck
+          needs: check
+
+      - uses: r-lib/actions/check-r-package@v2
+        working-directory: ${{ matrix.sample }}
+        with:
+          upload-snapshots: true
+          build_args: 'c("--no-manual","--compact-vignettes=gs+qpdf")'
+

samples/client/petstore/R/.openapi-generator-ignore

@@ -21,3 +21,5 @@
 #docs/*.md
 # Then explicitly reverse the ignore rule for a single file:
 #!docs/README.md
+#
+#