build: Improves CI

This was mostly copied over from https://github.com/GraphQLSwift/ci

Author: NeedleInAJayStack

.github/workflows/test.yml

@@ -1,23 +1,43 @@
-name: test
+name: Test
+
 on:
   pull_request:
   push: { branches: [ main ] }
 
+env:
+  PACKAGE_PATH: ${{ inputs.package_path != '' && format('--package-path={0}', inputs.package_path) || '' }}
+
 jobs:
-  macos-test:
+  macos:
+    name: Test on macOS
     runs-on: macos-latest
     steps:
-      - uses: maxim-lobanov/setup-xcode@v1
-        with:
-          xcode-version: latest
-      - uses: actions/checkout@v4
-      - name: Darwin build & test
-        run: swift test --enable-all-traits --skip IntegrationTests
-  linux-test:
+    - uses: maxim-lobanov/setup-xcode@v1
+      with:
+        xcode-version: latest-stable
+    - uses: actions/checkout@v4
+    - name: Build and test
+      run: |
+        swift test \
+          --parallel \
+          --enable-all-traits \
+          --skip IntegrationTests
+
+  linux:
+    name: Test on Linux - ${{ matrix.swift-image }}
+    strategy:
+      matrix:
+        swift-image:
+          - "swift:6.1-jammy"
+          - "swift:6.1-noble"
     runs-on: ubuntu-latest
-    container:
-      image: swift:latest
+    container: ${{ matrix.swift-image }}
     steps:
-      - uses: actions/checkout@v4
-      - name: Linux build & test
-        run: swift test --traits ClientNIO,ServerVapor --skip IntegrationTests
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Test
+      run: |
+        swift test \
+          --parallel \
+          --traits ClientNIO,ServerVapor \
+          --skip IntegrationTests