Build/dependency updates

[abrondijk]

Adds/changes the following:

• Adds nlohmann/json library
• Changed c++20 to c++23 for, among other, std::expected support
• Changed platform-espressif to latest release. Other than bug fixes, nothing relevant for us
• Changed ESPP to latest release (technically to main, which has 1 additional commit with a fix that isn't released yet)
• Changed SDK to latest main