Support non-streaming zipformer CTC ASR models (#2340)

This PR adds support for non-streaming Zipformer CTC ASR models across 
multiple language bindings, WebAssembly, examples, and CI workflows.

- Introduces a new OfflineZipformerCtcModelConfig in C/C++, Python, Swift, Java, Kotlin, Go, Dart, Pascal, and C# APIs
- Updates initialization, freeing, and recognition logic to include Zipformer CTC in WASM and Node.js
- Adds example scripts and CI steps for downloading, building, and running Zipformer CTC models

Model doc is available at
https://k2-fsa.github.io/sherpa/onnx/pretrained_models/offline-ctc/icefall/zipformer.html

kotlin-api-examples/run.sh

@@ -253,6 +253,13 @@ function testOfflineAsr() {
     rm sherpa-onnx-zipformer-multi-zh-hans-2023-9-2.tar.bz2
   fi
 
+  if [ ! -f ./sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03/model.int8.onnx ]; then
+    curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+
+    tar xvf sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+    rm sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03.tar.bz2
+  fi
+
   out_filename=test_offline_asr.jar
   kotlinc-jvm -include-runtime -d $out_filename \
     test_offline_asr.kt \

kotlin-api-examples/test_offline_asr.kt

@@ -1,7 +1,7 @@
 package com.k2fsa.sherpa.onnx
 
 fun main() {
-  val types = arrayOf(0, 2, 5, 6, 15, 21, 24, 25)
+  val types = arrayOf(0, 2, 5, 6, 15, 21, 24, 25, 31)
   for (type in types) {
     test(type)
   }
@@ -19,6 +19,7 @@ fun test(type: Int) {
     21 -> "./sherpa-onnx-moonshine-tiny-en-int8/test_wavs/0.wav"
     24 -> "./sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16/test_wavs/0.wav"
     25 -> "./sherpa-onnx-dolphin-base-ctc-multi-lang-int8-2025-04-02/test_wavs/0.wav"
+    31 -> "./sherpa-onnx-zipformer-ctc-zh-int8-2025-07-03/test_wavs/0.wav"
     else -> null
   }