Restructure algorithms dir

[TomerGoldfriend]

PR Description

This PR restructure the algorithms directory, (including fixing the relevant links in other notebooks)

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[orsa-classiq]

1 - Some directories hierarchies were flattened. Specifically grover_mixer_qaoa should be directly under search_and_optimization, or you leave it under qaoa, but then create another directory to the regular qaoa.
Also glued trees directory is missing
2 - I think you should remove ground_state_... directory and move its contents to quantum_state_preparation
3 - consider removing the hhl directory (leaving only a single hhl directory under quantum_linear_solvers, as it contains only a single directory). Same for vqls

[TomerGoldfriend]

1 - Some directories hierarchies were flattened. Specifically grover_mixer_qaoa should be directly under search_and_optimization, or you leave it under qaoa, but then create another directory to the regular qaoa. Also glued trees
directory is missing

OK, some of the flattening is due to github, which does not care about redundant hierarchies. I hope that very soon we will have at least two examples per directory.

2 - I think you should remove ground_state_... directory and move its contents to quantum_state_preparation

I prefer to keep it as is. In particular, QPE is not related to quantum_state_preparation.

3 - consider removing the hhl directory (leaving only a single hhl directory under quantum_linear_solvers, as it contains
only a single directory). Same for vqls

Thanks! great catch.
@orsa-classiq

[github-actions]

🏆 Incredible, @TomerGoldfriend! You've merged your 53th PR! 🎯🎊

Your ongoing commitment to classiq-library is truly remarkable. You're a driving force in our community! 🚀
Your contributions are helping to shape the future of quantum computing! What exciting features or improvements do you envision next? 🔮

We are grateful for your dedication! 💫