GH Actions: publish v*.dev* tags to TestPyPI

See https://packaging.python.org/en/latest/guides/publishing-package-distribution-releases-using-github-actions-ci-cd-workflows/

Author: generalmimon

.editorconfig

@@ -5,3 +5,6 @@ charset = utf-8
 indent_style = space
 indent_size = 4
 insert_final_newline = true
+
+[*.yml]
+indent_size = 2

.github/workflows/release.yml

@@ -0,0 +1,55 @@
+name: Publish to TestPyPI
+
+on:
+  push:
+    tags:
+      - 'v0.[0-9]+.dev[0-9]+'
+
+permissions: {}
+
+jobs:
+  build:
+    name: Build package distributions
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.x'
+      - name: Install pypa/build
+        run: python3 -m pip install build --user
+      - name: Build a binary wheel and a source tarball
+        run: python3 -m build
+      - name: Store the package distributions
+        uses: actions/upload-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+
+  publish-to-testpypi:
+    name: Publish to TestPyPI
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    environment:
+      name: testpypi
+      url: https://test.pypi.org/p/kaitaistruct
+    permissions:
+      # IMPORTANT: mandatory for trusted publishing - see
+      #   https://packaging.python.org/en/latest/guides/publishing-package-distribution-releases-using-github-actions-ci-cd-workflows/
+      id-token: write
+    steps:
+      - name: Download all the dists
+        uses: actions/download-artifact@v5
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish distribution to TestPyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/