ci: consolidate scripts and make sure to install fonts

.github/workflows/tests.yml

@@ -21,6 +21,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Install fonts
+        run: |
+          sudo apt update
+          sudo apt-get install fonts-font-awesome fonts-roboto texlive-fonts-recommended texlive-fonts-extra
+
       - name: Probe runner package cache
         uses: awalsh128/cache-apt-pkgs-action@v1
         with:
@@ -65,4 +70,10 @@ jobs:
 
       - name: Build docs
         if: ${{ matrix.doc }}
-        run: just doc
+        run: just doc
+     
+      - name: Upload docs
+        uses: actions/upload-artifact@v4
+        with:
+          name: manual
+          path: docs/manual.pdf