Link out to integration details in the docs in relevant READMEs

[shannynat]

Based on this comment: aranya-project/aranya#39 (comment), we should have in-depth information on the integration steps in the docs (#38) rather than in the READMEs. The README can then link out to the relevant sections of the docs, rather than maintaining this information in multiple places and overwhelming the README with these details.

[shannynat]

(Examples from linked comment)

https://github.com/facebook/react?tab=readme-ov-file#react------
https://github.com/rabbitmq/rabbitmq-server?tab=readme-ov-file#rabbitmq-server
https://github.com/dbt-labs/dbt-core?tab=readme-ov-file#getting-started
https://github.com/kubernetes/kubernetes?tab=readme-ov-file#kubernetes-k8s

[shannynat]

Initially, we should use the content from the Aranya README's Getting Started section (added here: aranya-project/aranya#39). Having this information on the docs site will allow us to more clearly differentiate the ways it can be installed/built/integrated. Also, will give us room to add information to each of those sections.

This should be added under the Getting Started section of the docs site, as a top-level doc (initially, could be multiple docs depending on how the information is best divided up).