Examples by topics (#1967)

* add reasoning example

* title

* task decomposition

* update demo with custom speark function

* update

* Add metaprompt

* add notebook to topics

* remove

* remove endpoint setup and collab

* ignore words

* rename

* Update .pre-commit-config.yaml

* codespell

* Updates to formatting and content tweaks

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Co-authored-by: kevin666aa <yrwu000627@gmail.com>
Co-authored-by: LeoLjl <3110503618@qq.com>
Co-authored-by: Jack Gerrits <jack@jackgerrits.com>
Co-authored-by: Jack Gerrits <jackgerrits@users.noreply.github.com>