Run SwiftLint on CI

Author: iangmaia

.buildkite/pipeline.yml

@@ -1,7 +1,7 @@
 # Nodes with values to reuse in the pipeline.
 common_params:
   plugins: &common_plugins
-    - automattic/a8c-ci-toolkit#3.0.1
+    - automattic/a8c-ci-toolkit#3.1.0
   env: &common_env
     IMAGE_ID: xcode-15.0.1
 
@@ -35,6 +35,15 @@ steps:
   #################
   # Lint
   #################
+  - label: ":swift: SwiftLint"
+    command: run_swiftlint --strict
+    plugins: *common_plugins
+    notify:
+      - github_commit_status:
+          context: "SwiftLint"
+    agents:
+      queue: "default"
+
   - label: "🧹 Lint"
     key: "lint"
     command: |