i18n(zh_TW): align with Studio built-in en_US and fully refine Taiwanese localization

[chen21019]

Summary

This PR performs a full review and refinement of zh_TW.json to:

1. align translations with Msty''s LLM/chat product context,
2. use natural Taiwanese terminology,
3. fix inconsistent, awkward, or misleading wording.

Context

There appears to be a version gap between the public msty-studio-i18n repo and the locale exported from Msty Studio.
This translation work was aligned against the newer Studio built-in en_US.json to avoid missing newer keys/features.

What was improved

• Replaced terms that do not fit an LLM/AI UI context.
• Standardized inconsistent wording across similar UI flows/features.
• Standardized Prompts as "提示詞" (instead of generic/ambiguous alternatives).
• Standardized Forge-related wording as "創建" (without leaving English terms).
• Removed uncommon or unnatural phrases and rewrote them for fluent zh-TW UX.
• Carefully verified template safety and formatting:
  • placeholders: {count}, {modelName}, {progress}, etc.
  • i18n references: @:...
  • plural pipeline forms: singular | plural
  • escaping and JSON validity

Validation

• JSON parses successfully.
• Key-path structure remains aligned with source keys.
• No functional/code changes; translation-only update.

Note for maintainers

If possible, please consider syncing the public en_US.json baseline with the newer Studio built-in version first, so community translations can stay in sync with current app features.