feat: Add new instruction templates for different output formats

This commit introduces new instruction templates for generating different output formats, including:

- **中文演講:** Generates a lecture script in Traditional Chinese.
- **上課:** Generates a class script in Traditional Chinese.
- **補教名師:** Generates a tutoring class script in Traditional Chinese.

These templates provide users with more options for customizing the output of the PDF to Audio tool.

Author: killkli