Merge pull request 'Run checks in CI via Forgejo Actions' (#12) from mailship-e77-run-checks-in-ci-via-forgejo-actions-605 into main

Reviewed-on: #12
Reviewed-by: matt <matt@lorentz.is>

.forgejo/workflows/ci.yml

@@ -0,0 +1,31 @@
+# Forgejo Actions CI — runs the repo's check gate on every push/PR
+# Single source of truth: ./script/checks defines what "passing CI" means.
+---
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+
+      - name: Install dependencies
+        run: |
+          corepack enable
+          pnpm i --frozen-lockfile
+
+      - name: Run check gate
+        run: ./script/checks