use SwiftLang's license header check (#10)

* use SwiftLang's license header check with swiftlang/github-workflows#36

* remove .licenseignore fril from .licenseignore

Author: sebsto

Diff for: .github/workflows/pull_request.yaml

@@ -13,34 +13,14 @@ jobs:
     name: Soundness
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
     with:
-      # do not use SwiftLang's license header check because the copyright for this project is Amazon.com + contributors
-      license_header_check_enabled: false
+      license_header_check_enabled: true
       license_header_check_project_name: "Swift OpenAPI Lambda"
       shell_check_enabled: false
       python_lint_check_enabled: false
       api_breakage_check_container_image: "swift:6.0-noble"
       docs_check_container_image: "swift:6.0-noble"
       format_check_container_image: "swiftlang/swift:nightly-6.0-jammy"
 
-  license:
-    name: License headers check
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - name: Mark the workspace as safe
-        # https://github.com/actions/checkout/issues/766
-        run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
-      - name: License headers check
-        env:
-          PROJECT_NAME: "Swift OpenAPI Lambda"
-        run: |
-          ./scripts/check-license-headers.sh
-
   unit-tests:
     name: Unit tests
     uses: apple/swift-nio/.github/workflows/unit_tests.yml@main

Diff for: .license_header_template

@@ -0,0 +1,14 @@
+@@===----------------------------------------------------------------------===@@
+@@
+@@ This source file is part of the Swift OpenAPI Lambda open source project
+@@
+@@ Copyright (c) YEARS Amazon.com, Inc. or its affiliates
+@@                    and the Swift OpenAPI Lambda project authors
+@@ Licensed under Apache License v2.0
+@@
+@@ See LICENSE.txt for license information
+@@ See CONTRIBUTORS.txt for the list of Swift OpenAPI Lambda project authors
+@@
+@@ SPDX-License-Identifier: Apache-2.0
+@@
+@@===----------------------------------------------------------------------===@@

Diff for: .licenseignore

@@ -1,5 +1,4 @@
 .gitignore
-.licenseignore
 .swiftformatignore
 .spi.yml
 .swift-format