perf: use Docker container with pre-installed LaTeX

Reduces build time from 4+ minutes to seconds by using texlive/texlive:latest Docker image instead of installing texlive-full.

.github/workflows/compile-papers.yml

@@ -23,6 +23,8 @@ permissions:
 jobs:
   compile-pdfs:
     runs-on: ubuntu-latest
+    container:
+      image: texlive/texlive:latest
     
     steps:
       - name: Checkout repository