documentation and QuizGen+TweetGen notebooks

[arnavsinghvi11]

-documentation for DSPy Assertions -example notebooks for the QuizGen and TweetGen tasks

[arnavsinghvi11]

WIP currently since Compile+Infer strategy is running into caching errors due to some recent changes (working with QuizGen, not with TweetGen). will merge once this is resolved.

(note - Colab links point to main for now (not working since no reference yet), but for testing, please adjust to the corresponding path on this branch)

[okhat]

Maybe mark as "draft" if still WIP

[okhat]

Btw cache problems, are they due to openai version? 0.28.1 vs 1.16

[Shangyint]

The issue might be due to multithreading in compiling. Needs to investigate further, but as for the cached notebook, it is fine to use one thread for compile, which solves the current issue.