fixup! fixup! chore(ci): faster build

Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

Author: skjnldsv

.github/workflows/sphinxbuild.yml

@@ -11,10 +11,39 @@ permissions:
   contents: read
 
 jobs:
-  build:
+  setup:
+    name: Setup dependencies and cache
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Cache LaTeX apt packages
+      uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
+      with:
+        path: /var/cache/apt/archives
+        key: latex-apt-${{ runner.os }}-${{ hashFiles('.github/workflows/*.yml') }}
+        restore-keys: |
+          latex-apt-${{ runner.os }}-
+
+    - name: Install LaTeX dependencies
+      run: |
+        sudo DEBIAN_FRONTEND=noninteractive apt-get update
+        sudo DEBIAN_FRONTEND=noninteractive apt-get install -y \
+          --no-install-recommends \
+          python3-pil \
+          texlive-fonts-recommended \
+          latexmk \
+          texlive-latex-extra \
+          texlive-latex-recommended \
+          texlive-xetex \
+          texlive-fonts-extra-links \
+          texlive-fonts-extra \
+          xindy
+        sudo chmod -R a+r /var/cache/apt/archives
 
+  build:
     name: Build ${{ matrix.manual.name }}
     runs-on: ubuntu-latest
+    needs: setup
 
     strategy:
       matrix:
@@ -58,7 +87,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-    - name: Cache LaTeX apt packages
+    - name: Restore LaTeX apt packages cache
       if: ${{ matrix.manual.build_pdf_path }}
       uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
       with:
@@ -67,16 +96,11 @@ jobs:
         restore-keys: |
           latex-apt-${{ runner.os }}-
 
-    - name: Fix apt cache permissions
-      if: ${{ matrix.manual.build_pdf_path }}
-      run: sudo chmod -R a+r /var/cache/apt/archives
-
     - name: Install LaTeX dependencies
       if: ${{ matrix.manual.build_pdf_path }}
       run: |
         sudo DEBIAN_FRONTEND=noninteractive apt-get update
         sudo DEBIAN_FRONTEND=noninteractive apt-get install -y \
-          --no-install-recommends \
           python3-pil \
           python3-pip \
           texlive-fonts-recommended \