Add release workflow

This workflow will attach a packaged exe to every release.

.github/workflows/release.yml

@@ -0,0 +1,34 @@
+name: Package for windows
+
+on:
+  release:
+    types: [created]
+  workflow_dispatch:
+
+jobs:
+  generate:
+    strategy:
+      matrix:
+        platform: [windows-latest]
+    runs-on: ${{ matrix.platform }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Run build.py
+        run: |
+          python -m pip install poetry
+          poetry install
+          poetry run python build.py
+
+      - name: Upload the artifacts
+        uses: softprops/action-gh-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          files: dist/*