Fix CI: use swift-actions/setup-swift@v2 with swift-version: 6.2

The deprecated compnerd/gha-setup-swift@main action was causing CI failures
on all platforms. Replaced with swift-actions/setup-swift@v2 which is the
actively maintained Swift setup action for GitHub Actions.

Also simplified test scripts to use direct 'swift test' command instead
of wrapper scripts that had Docker fallback and PowerShell compatibility
issues on CI runners.

Author: M1tsumi

.github/workflows/ci.yml

@@ -16,20 +16,15 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Swift 6.2
-        uses: compnerd/gha-setup-swift@main
+        uses: swift-actions/setup-swift@v2
         with:
-          source: swift.org
-          swift-version: swift-6.2-release
-          swift-build: 6.2-RELEASE
+          swift-version: "6.2"
 
       - name: Run tests (Unix)
         if: matrix.os != 'windows-latest'
-        run: |
-          chmod +x scripts/run-tests.sh || true
-          ./scripts/run-tests.sh
+        run: swift test
 
       - name: Run tests (Windows)
         if: matrix.os == 'windows-latest'
         shell: pwsh
-        run: |
-          .\scripts\run-tests.ps1
+        run: swift test

.github/workflows/docs.yml

@@ -20,11 +20,9 @@ jobs:
         uses: actions/configure-pages@v4
 
       - name: Install Swift 6.2
-        uses: compnerd/gha-setup-swift@main
+        uses: swift-actions/setup-swift@v2
         with:
-          source: swift.org
-          swift-version: swift-6.2-release
-          swift-build: 6.2-RELEASE
+          swift-version: "6.2"
 
       - name: Generate Documentation
         run: |