v0.6

• Refactor code
• All translations are performed in batch mode
• In case of errors in batch mode, retry the problematic parts using single-line mode; there is essentially no situation where translation fails (tested on Google Translate and DeepseekV3)
• Reference texts can still be used normally in batch mode (the latest LLMs no longer require reference texts, which are not recommended due to poor effectiveness)
• Clearer error messages