Improving getting started materials

[cjnolet]

Adding documentation for each index type. This decouples the major details in the docs from the individual language API docs to present users with a better overal experience. The major topcs in the new index-level docs are meant to be more exhaustive than the API docs in providing

1. Description of each index type, when it's useful and shortcomings
2. Links to any relevant research material to learn more foundational info
3. Hyper-parameters
4. Links to API docs for each supported language
5. Links to example projects and notebooks
6. Formulas for rough estimates of memory footprint
7. How to use in cuvs-bench, along with some rough benchmarks on different hardware

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.37%. Comparing base (59bc6bd) to head (83994a7).
Report is 4 commits behind head on branch-24.10.

Additional details and impacted files

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  Coverage         70.37%   70.37%           
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  Files                12       12           
  Lines                54       54           
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  Hits                 38       38           
  Misses               16       16           

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[cjnolet]

Moved the cpp tutorial over to a differerent branch for now: https://github.com/rapidsai/cuvs/tree/doc-2412-cpp_tutorial

[dantegd]

Overall things look fantastic! Just very few minor comments

[dantegd]

Would be great to also add the pip command below this.

[cjnolet]

The only reason I didn't is to try and minimize the number of places we have this info, since it adds to the challenge of keeping everything up to day. I think we should definiely mention pip, though, and link to the build guide. I considered doing this for conda too. What do you think? Or as a user, would you rather see both pip and conda right in the readme?

[dantegd]

Consideration for follow up: it'd be great to have a script or job that changes this links to stable at release time, and keeps the as nightly during dev

[benfred]

amazing work on this - this is a great change.

I left some minor comments, but pre-approving since none of them are blocking

[cjnolet]

/merge