Tree-of-thoughts and Graph-of-thoughts

[XxxAtlantis]

DSPy is very powerful and has helped me a lot in my work. Currently, the DSPy library only has chain of thought. Perhaps it could be possible to implement tree of thought (https://github.com/kyegomez/tree-of-thoughts) and graph-of-thoughts (https://github.com/spcl/graph-of-thoughts).