[COURSE] LLMs and Deep Generative Models related courses

[AkazaAkane]

This pull request introduces a new section titled "大型语言模型与生成模型" and adds the following courses under this section:

• CMU CS11-667: Large Language Models Methods and Applications
• Stanford CS324: Large Language Models
• UCB CS194/294-267: Understanding Large Language Models

Additionally, it updates the structure of the document to improve clarity and organization. All links point to their respective markdown files for better reference.

[PKUFlyingPig]

Thanks for your contribution. I am also working on a similar PR on this topic and will merge your PR later together.