Add automated check workflow

.Rbuildignore

@@ -1,2 +1,3 @@
 ^\.travis\.yml$
+^\.github/.*
 ^README\.md$

.github/workflows/package_check.yml

@@ -0,0 +1,26 @@
+name: R Build and Checks
+on: [push, pull_request]
+
+jobs:
+  R-CMD-check:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+      R_KEEP_PKG_SOURCE: yes
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          use-public-rspm: true
+
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          extra-packages: any::rcmdcheck
+          needs: check
+
+      - uses: r-lib/actions/check-r-package@v2
+        with:
+          args: 'c("--no-manual", "--as-cran")'
+          error-on: '"note"'
+          check-dir: '"check"'