[docs] Reorganize getting started pages

[alaninnovates]

Description

Pages under the getting started section are becoming quite heavy, including lots of information that a first time PhotonVision user does not need. This PR aims to reduce the amount of clutter under the getting started page, and make a more opinionated first-time user experience. More advanced settings and configuration are moved to a separate section.

Meta

Merge checklist:

• Pull Request title is short, imperative summary of proposed changes
• The description documents the what and why
• If this PR changes behavior or adds a feature, user documentation is updated
• If this PR touches photon-serde, all messages have been regenerated and hashes have not changed unexpectedly
• If this PR touches configuration, this is backwards compatible with settings back to v2024.3.1
• If this PR touches pipeline settings or anything related to data exchange, the frontend typing is updated
• If this PR addresses a bug, a regression test for it is added