add debug statements to find pdf build error

Author: garfieldnate

.github/workflows/build_pdf.yml

@@ -13,6 +13,15 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
+    - name: Debug environment
+      run: |
+        echo "Current directory: $(pwd)"
+        echo "Files in current directory:"
+        ls -la
+        echo "Files in docs directory:"
+        ls -la ./docs
+        echo "Files in docs/soar_manual directory:"
+        ls -la ./docs/soar_manual
     - name: Build Manual PDF
       run: ./docs/soar_manual/build.sh
     - name: Upload Artifacts