dev: add CI

Author: chpxu

.github/renovate.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ],
+  "nix": {
+    "enabled": true
+  },
+  "schedule": [
+    "every weekend"
+  ],
+  "lockFileMaintenance": {
+    "enabled": true
+  }
+}

.github/workflows/ci.yaml

@@ -0,0 +1,27 @@
+name: "Check devflake"
+
+on:
+  pull_request:
+  push:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  tests-flakes:
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v6
+    - uses: cachix/install-nix-action@v31
+    - uses: cachix/cachix-action@v16
+      with:
+        name: pre-commit-hooks
+    - run: rm -rf /opt&
+
+    - name: Check flake
+      working-directory: ./
+      run: nix flake check -L --show-trace --no-write-lock-file