add github action

.github/workflows/build.yaml

@@ -0,0 +1,35 @@
+name: Compile and publish PDF
+on: [push, workflow_dispatch]
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Compile PDF
+        uses: lvignoli/typst-action@main
+        with:
+          source_file: |
+            main.typ
+
+      - name: Upload PDF
+        uses: actions/upload-artifact@v3
+        with:
+          name: BachelorThesis
+          path: main.pdf
+
+      - name: Get current date
+        id: date
+        run: echo "DATE=$(date +%Y-%m-%d-%H:%M)" >> $GITHUB_ENV
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v1
+        if: github.ref_type == 'tag'
+        with:
+          name: "${{ github.ref_name }} — ${{ env.DATE }}"
+          files: main.pdf