Use GitHub Actions rather than Zuul for CI

Fixes: #3

Signed-off-by: Nils Philippsen <nils@redhat.com>

.github/workflows/main.yaml

@@ -0,0 +1,58 @@
+---
+# SPDX-FileCopyrightText: Contributors to the Fedora Project
+#
+# SPDX-License-Identifier: MIT
+
+name: CI
+on: [push, pull_request, workflow_dispatch]
+jobs:
+  ci-smoketests:
+    strategy:
+      fail-fast: false
+    runs-on: ubuntu-latest
+    container: fedorapython/fedora-python-tox:latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install absolufy and poetry
+        run: |
+          python3 -m pip install absolufy-imports poetry
+
+      - name: Enforce relative imports in package
+        run: >
+          find rpmautospec -name \*.py -print0
+          | xargs -0 absolufy-imports --never
+
+      - name: Check Poetry lock file consistency
+        run: >
+          poetry lock --check
+
+  ci-testsuite:
+    strategy:
+      fail-fast: false
+      matrix:
+        tox-env: ["py39", "py310", "py311", "py312"]
+    runs-on: ubuntu-latest
+    container: fedorapython/fedora-python-tox:latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Mark the directory as safe for git
+        run: git config --global --add safe.directory $PWD
+
+      - name: Install RPM dependencies
+        run: >
+          dnf -y install
+          gcc
+          glibc-langpack-de
+          glibc-langpack-en
+          libffi-devel
+          libgit2-devel
+          poetry
+
+      - name: Install base Python dependencies
+        run: |
+          python3 -m pip install --upgrade tox
+
+      - name: run tests through tox
+        run: "tox -e ${{ matrix.tox-env }}"