feat: Add Swift example

WORKSPACE

@@ -220,6 +220,12 @@ http_archive(
     url = "https://github.com/bazelbuild/rules_rust/releases/download/0.18.0/rules_rust-v0.18.0.tar.gz",
 )
 
+http_archive(
+    name = "build_bazel_rules_swift",
+    sha256 = "51efdaf85e04e51174de76ef563f255451d5a5cd24c61ad902feeadafc7046d9",
+    url = "https://github.com/bazelbuild/rules_swift/releases/download/1.2.0/rules_swift.1.2.0.tar.gz",
+)
+
 http_archive(
     name = "uncrustify",
     build_file_content = """filegroup(name = "all", srcs = glob(["**"]), visibility = ["//visibility:public"])""",
@@ -456,3 +462,11 @@ container_deps()
 load("@io_bazel_rules_docker//go:image.bzl", _go_image_repos = "repositories")
 
 _go_image_repos()
+
+load("@build_bazel_rules_swift//swift:repositories.bzl", "swift_rules_dependencies")
+
+swift_rules_dependencies()
+
+load("@build_bazel_rules_swift//swift:extras.bzl", "swift_rules_extra_dependencies")
+
+swift_rules_extra_dependencies()

src/swift/hello_world/BUILD.bazel

@@ -0,0 +1,13 @@
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_binary")
+load("//tools/test/binary:binary.bzl", "binary_test")
+
+binary_test(
+    name = "hello_world_test",
+    binary = ":hello_world",
+)
+
+
+swift_binary(
+    name = "hello_world",
+    srcs = ["main.swift"],
+)

src/swift/hello_world/main.swift

@@ -0,0 +1 @@
+print("Hello, World!")