Add Latex compile workflow

.github/workflows/pdf.yml

@@ -0,0 +1,32 @@
+name: Generate PDFs
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Setup Git repository
+        uses: actions/checkout@v2
+
+      - name: Compile Problems
+        uses: xu-cheng/latex-action@v2
+        with:
+          root_file: |
+            constitution.tex
+          work_in_root_file_dir: true
+
+      - name: Upload Artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: UWCS Programming Problem Sets
+          path: |
+            constitution.pdf
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: |
+            constitution.pdf