Install standard ci.yaml for r2u use

Added extra paragraph with 'install_all' to explicitly install suggested
dependencies as well as actual dependencies

Additional blocks or commands can be added, if needed, as usual via shell or
Rscript snippet

.github/workflows/ci.yaml

@@ -0,0 +1,43 @@
+# Run CI for R using https://eddelbuettel.github.io/r-ci/
+
+name: ci
+
+on:
+  push:
+  pull_request:
+
+env:
+  _R_CHECK_FORCE_SUGGESTS_: "false"
+
+jobs:
+  ci:
+    strategy:
+      matrix:
+        include:
+          #- {os: macOS-latest}
+          - {os: ubuntu-latest}
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup
+        uses: eddelbuettel/github-actions/r-ci-setup@master
+
+      - name: Bootstrap
+        run: ./run.sh bootstrap
+
+      #- name: Dependencies
+      #  run: ./run.sh install_deps
+
+      - name: All Dependencies
+        run: ./run.sh install_all
+
+      - name: Test
+        run: ./run.sh run_tests
+
+      #- name: Coverage
+      #  if: ${{ matrix.os == 'ubuntu-latest' }}
+      #  run: ./run.sh coverage