Add workflows

Author: SwitWu

.github/workflows/compile.yml

@@ -0,0 +1,18 @@
+name: Build LaTeX document
+on: [push]
+jobs:
+  build_latex:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Git repository
+        uses: actions/checkout@v4
+      - name: Compile LaTeX document
+        uses: xu-cheng/latex-action@v3
+        with:
+          root_file: main.tex
+          latexmk_use_xelatex: true
+      - name: Upload PDF file
+        uses: actions/upload-artifact@v4
+        with:
+          name: PDF
+          path: main.pdf