build: add ktlint check CI action

Author: thunderbiscuit

.github/workflows/ktlint.yaml

@@ -0,0 +1,21 @@
+name: Ktlint Check
+
+on: [workflow_dispatch, pull_request]
+
+jobs:
+  ktlint:
+    name: "Run Ktlint Check"
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: "Checkout branch"
+        uses: actions/checkout@v4
+
+      - name: "Set up JDK 17"
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+
+      - name: "Run Ktlint Check"
+        run: ./gradlew ktlintCheck