CI: Backporting releases from PyPI to Github

Author: NecRaul

.github/workflows/backport.yml

@@ -0,0 +1,39 @@
+name: Backport PyPI release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "PyPI version (for example 1.0)"
+        required: true
+        type: string
+
+permissions:
+  contents: write
+
+jobs:
+  gh-release:
+    runs-on: ubuntu-24.04
+    env:
+      PACKAGE: lain-upload
+      VERSION: ${{ inputs.version }}
+
+    steps:
+      - name: Download release files from PyPI
+        run: |
+          mkdir dist
+
+          curl -fsSL \
+            "https://pypi.org/pypi/${PACKAGE}/${VERSION}/json" |
+          jq -r '.urls[].url' |
+          while read -r url; do
+            curl -fsSL -O -J "$url" --output-dir dist
+          done
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v3
+        with:
+          tag_name: v${{ inputs.version }}
+          name: ${{ env.PACKAGE }} v${{ inputs.version }}
+          files: dist/*
+          generate_release_notes: true