chore: make a post on discord on every release

.github/workflows/release-CI.yml

@@ -202,3 +202,48 @@ jobs:
         run: |
           uv pip install --upgrade twine
           twine upload --skip-existing *.whl
+
+  discord-notify:
+    name: Discord Release Notification
+    runs-on: ubuntu-latest
+    needs: [release]
+    if: always() && needs.release.result == 'success'
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Build and send Discord notification
+        env:
+          DISCORD_WEBHOOK_URL: ${{ secrets.DISCORD_WEBHOOK_URL }}
+        run: |
+          if [[ "$GITHUB_REF" != refs/tags/v* ]]; then
+            echo "::warning::GITHUB_REF ($GITHUB_REF) is not a tag push — skipping Discord notification"
+            exit 0
+          fi
+
+          VERSION="${GITHUB_REF#refs/tags/v}"
+          PREV_TAG=$(git tag --sort=-v:refname | grep -E '^v[0-9]' | sed -n '2p')
+
+          if [ -z "$PREV_TAG" ]; then
+            CHANGELOG=$(git log --pretty=format:"- %s" --no-merges -20 | grep -v "^- Release " || true)
+          else
+            CHANGELOG=$(git log "${PREV_TAG}..HEAD" --pretty=format:"- %s" --no-merges | grep -v "^- Release " || true)
+          fi
+
+          read -r -d '' MESSAGE << EOM || true
+          Hey @everyone 👋
+
+          **Release Robyn v${VERSION}**
+
+          ${CHANGELOG}
+
+          Upgrade: \`pip install --upgrade robyn\`
+
+          https://github.com/sparckles/Robyn/releases/tag/v${VERSION}
+          EOM
+
+          PAYLOAD=$(jq -n --arg msg "$MESSAGE" '{content: $msg}')
+
+          curl -f -H "Content-Type: application/json" \
+            -d "$PAYLOAD" \
+            "$DISCORD_WEBHOOK_URL"