Update docs dependencies and do some house cleaning

[Gold856]

Description

Update all of the dependencies used for docs. Also remove some unused assets and fix some typos.

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 addresses a bug, a regression test for it is added

[mcm001]

Did you do this manually or automatically? if auto, we should document.