Added PyPI publish workflow

.github/workflows/pypi-publish.yml

@@ -0,0 +1,26 @@
+on:
+  push:
+    tags:
+    - v*
+jobs:
+  pypi-publish:
+    name: Upload release to PyPI
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/zstd-asgi
+    permissions:
+      id-token: write  # IMPORTANT: this permission is mandatory for trusted publishing
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v4
+      with:
+        python-version: 3.9
+    - run: |
+        python -m pip install --upgrade pip
+        pip install build
+    - run: python -m build
+    - uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        repository-url: https://test.pypi.org/legacy/
+