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"
+