Add C++ runtime for Matcha-TTS (#1627)

sherpa-onnx/csrc/offline-tts-model-config.h

@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include "sherpa-onnx/csrc/offline-tts-matcha-model-config.h"
 #include "sherpa-onnx/csrc/offline-tts-vits-model-config.h"
 #include "sherpa-onnx/csrc/parse-options.h"
 
@@ -14,6 +15,7 @@ namespace sherpa_onnx {
 
 struct OfflineTtsModelConfig {
   OfflineTtsVitsModelConfig vits;
+  OfflineTtsMatchaModelConfig matcha;
 
   int32_t num_threads = 1;
   bool debug = false;
@@ -22,9 +24,11 @@ struct OfflineTtsModelConfig {
   OfflineTtsModelConfig() = default;
 
   OfflineTtsModelConfig(const OfflineTtsVitsModelConfig &vits,
+                        const OfflineTtsMatchaModelConfig &matcha,
                         int32_t num_threads, bool debug,
                         const std::string &provider)
       : vits(vits),
+        matcha(matcha),
         num_threads(num_threads),
         debug(debug),
         provider(provider) {}