ci: add GitHub Actions workflows

Add a CI workflow that runs build, test and lint on push and pull
requests. Add a docs workflow that builds the Sphinx documentation
and deploys it to GitHub Pages on push to main.

Signed-off-by: Robin Jarry <robin@jarry.cc>

Author: rjarry

.github/workflows/ci.yml

@@ -0,0 +1,59 @@
+# Patchwork - automated patch tracking system
+# Copyright (C) The Patchwork Contributors (see CONTRIBUTORS)
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - run: make
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - run: make test
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      - run: pip install codespell
+      - run: make lint
+
+  commits:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.commits
+    env:
+      REVISION_RANGE: "HEAD~${{ github.event.pull_request.commits }}.."
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      - run: pip install codespell
+      - run: make check-patches

.github/workflows/docs.yml

@@ -0,0 +1,46 @@
+# Patchwork - automated patch tracking system
+# Copyright (C) The Patchwork Contributors (see CONTRIBUTORS)
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+name: Docs
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      - run: make docs
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs/_build
+
+  deploy:
+    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v4