Support Chatterbox multilingual frontends

[ivan-digital]

Summary

• Add runtime Chatterbox frontends for Chinese, Japanese, and Korean, and expand the enabled language set to 23 languages.
• Add safe Hebrew support: pre-diacritized Hebrew with niqqud is accepted, while raw Hebrew fails early with a clear error until automatic Dicta ONNX diacritization is bundled.
• Require the published Cangjie map in the Chatterbox bundle so Chinese does not silently fall back to raw [UNK]-heavy tokenization.
• Default OmniVoice high-level loading to the fp16 bundle while leaving explicit int8 loading covered by tests.
• Update Chatterbox/OmniVoice docs and translated READMEs to match runtime behavior.

Test plan

• swift test --filter MTLTokenizerTests — 9 passed.
• swift test --filter E2ERoundtripTests — 3 executed, 1 expected skip for missing /tmp/cbx_ve.* golden files, 0 failures.
• swift test --skip E2E — 1,278 executed, 28 skipped, 0 failures.
• git diff --check — passed.