chore(ci): bootstrap CI + hooks

Squash-merge bootstrap-cicd into integration

.gitea/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  pull_request:
+    branches: ["**"]
+  push:
+    branches: ["integration", "bootstrap", "bootstrap-cicd"]
+
+jobs:
+  checks:
+    runs-on: docker
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build CI image
+        run: docker build -f ci.Dockerfile -t local/ci:latest .
+
+      - name: Lint
+        run: docker run --rm -v ${{ github.workspace }}:/workspace local/ci:latest bash -lc "cd /workspace && IN_CI_CONTAINER=1 scripts/ci lint"
+
+      - name: Build validation
+        run: docker run --rm -v ${{ github.workspace }}:/workspace local/ci:latest bash -lc "cd /workspace && IN_CI_CONTAINER=1 scripts/ci build"
+

.gitea/workflows/nightly.yml

@@ -0,0 +1,19 @@
+name: Nightly
+
+on:
+  schedule:
+    - cron: '0 3 * * *'
+
+jobs:
+  report:
+    runs-on: docker
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build CI image
+        run: docker build -f ci.Dockerfile -t local/ci:latest .
+
+      - name: Lint (nightly)
+        run: docker run --rm -v ${{ github.workspace }}:/workspace local/ci:latest bash -lc "cd /workspace && IN_CI_CONTAINER=1 scripts/ci lint"
+

.gitea/workflows/release.yml

@@ -0,0 +1,29 @@
+name: Release
+
+on:
+  push:
+    branches: ["main"]
+
+jobs:
+  tag-and-notes:
+    runs-on: docker
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build CI image
+        run: docker build -f ci.Dockerfile -t local/ci:latest .
+
+      - name: Compute tag
+        id: tag
+        run: |
+          TZ=UTC date +"v%Y.%m.%d-%H%M" > tag.txt
+          echo "tag=$(cat tag.txt)" >> $GITHUB_OUTPUT
+
+      - name: Create annotated tag
+        run: |
+          git config user.name "ci"
+          git config user.email "ci@local"
+          git tag -a ${{ steps.tag.outputs.tag }} -m "Release ${{ steps.tag.outputs.tag }}"
+          git push origin ${{ steps.tag.outputs.tag }}
+