chore(gh-actions): add style-lint on CI

.github/workflows/style-lint.yml

@@ -0,0 +1,22 @@
+name: 'Style Lint'
+
+on:
+  push:
+    paths:
+      - '_sass/**.scss'
+  pull_request:
+    paths:
+      - '_sass/**.scss'
+
+jobs:
+  stylelint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Setup Node
+        uses: actions/setup-node@v3
+      - run: npm i
+      - run: npm test

package.json

@@ -12,6 +12,10 @@
     "url": "https://github.com/cotes2020/jekyll-theme-chirpy/issues"
   },
   "homepage": "https://github.com/cotes2020/jekyll-theme-chirpy#readme",
+  "scripts": {
+    "test": "npx stylelint _sass/**/*.scss",
+    "fixlint": "npx stylelint _sass/**/*.scss --fix"
+  },
   "devDependencies": {
     "gulp": "^4.0.2",
     "gulp-concat": "^2.6.1",