add workflow

.gitea/workflows/generate.yml

@@ -0,0 +1,21 @@
+name: generate pdf files
+on:
+  push:
+    branches: ["main"]
+permissions:
+  contents: read
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: install deps
+        run: sudo apt-get update && sudo apt-get install make && sudo make install_ubuntu
+      - name: generate
+        run: make all
+      - uses: actions/upload-artifact@v4
+        with:
+          name: documents
+          path: pdf/*
+          overwrite: true