chore: Adjusts format CI to use docker

Author: NeedleInAJayStack

.github/workflows/test.yml

@@ -10,14 +10,14 @@ jobs:
     name: Format linting
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: sinoru/actions-setup-swift@v2
-        with:
-          swift-version: '5.6.1'
-      - name: GitHub Action for SwiftFormat
-        uses: CassiusPacheco/action-swiftformat@v0.1.0
-        with:
-          swiftformat-version: '0.49.17'
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Pull formatting docker image
+        run: docker pull ghcr.io/nicklockwood/swiftformat:latest
+      - name: Run format linting
+        run: docker run --rm -v ${{ github.workspace }}:/repo ghcr.io/nicklockwood/swiftformat:latest /repo --lint
   macos-build:
     name: Build and test on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}