Add API to get version information (#2309)

swift-api-examples/test-version.swift

@@ -0,0 +1,15 @@
+func run() {
+  let version = getSherpaOnnxVersion()
+  let gitSha1 = getSherpaOnnxGitSha1()
+  let gitDate = getSherpaOnnxGitDate()
+  print("sherpa-onnx version: \(version)")
+  print("sherpa-onnx gitSha1: \(gitSha1)")
+  print("sherpa-onnx gitDate: \(gitDate)")
+}
+
+@main
+struct App {
+  static func main() {
+    run()
+  }
+}