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/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
   }