Add GitHub Actions workflow for Makefile

.github/workflows/build-docs.yml

@@ -0,0 +1,37 @@
+name: Build Documentation
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Set up R environment
+      uses: r-lib/actions/setup-r@v2
+
+    - name: Install LaTeX
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y texlive-latex-base texlive-latex-extra texlive-fonts-recommended texlive-xetex
+
+    - name: Install R packages
+      run: |
+        Rscript -e 'install.packages(c("rmarkdown", "tools"))'
+
+    - name: Install Sweave (if not included)
+      run: |
+        Rscript -e 'install.packages("utils")'
+
+    - name: Run Makefile
+      run: |
+        make all