[CI] Add support for GitHub Actions

.github/workflows/pull_request.yml

@@ -0,0 +1,28 @@
+name: Pull request
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  tests:
+    name: Test
+    uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
+    with:
+      linux_os_versions: '["noble", "jammy", "focal", "rhel-ubi9"]'
+      linux_swift_versions: '["6.1", "nightly-main"]'
+      linux_build_command: 'swift build'
+      windows_swift_versions: '["6.1", "nightly-main"]'
+      windows_build_command: 'swift build'
+      enable_macos_checks: true
+      macos_xcode_versions: '["16.3"]'
+
+  soundness:
+    name: Soundness
+    uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
+    with:
+      license_header_check_project_name: "Swift.org"
+      docs_check_enabled: false
+      format_check_enabled: false
+      unacceptable_language_check_enabled: false
+      api_breakage_check_enabled: false

.license_header_template

@@ -0,0 +1,10 @@
+@@===----------------------------------------------------------------------===@@
+@@
+@@ This source file is part of the Swift.org open source project
+@@
+@@ Copyright (c) YEARS Apple Inc. and the Swift project authors
+@@ Licensed under Apache License v2.0 with Runtime Library Exception
+@@
+@@ See https://swift.org/LICENSE.txt for license information
+@@
+@@===----------------------------------------------------------------------===@@

.licenseignore

@@ -0,0 +1,3 @@
+Package.swift
+[email protected]
+LICENSE

Sources/_SubprocessCShims/include/target_conditionals.h

@@ -6,7 +6,6 @@
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See https://swift.org/LICENSE.txt for license information
-// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //
 //===----------------------------------------------------------------------===//
 

Tests/SubprocessTests/SubprocessTests+Windows.swift

@@ -7,7 +7,7 @@
 //
 // See https://swift.org/LICENSE.txt for license information
 //
-//===---------------------------------------------------------------------s-===//
+//===----------------------------------------------------------------------===//
 
 #if canImport(WinSDK)