Sync documentation with the latest server architecture

[arves100]

It would be for everyone use to have a server architecture summary or something like this where the following is explained:

• How brave frontier client networking actually works
• How brave frontier JSON works and the implications/difficulties or serializing such data
• How the packet-generator attempts to solve this issue and the implication of being not dependent by any programming language
• The workflow of packet-generator to server and the role of glaze
• How we aim to solve the Offline mod situation, and potentially what could be done to enable a retail server running with our code
• Create a packet-generator HOW_TO page that merges (and is synced with the latest syntax) of packet-generator KDL inside decompfrontier.github.io (our central hub)
• The approach to contributing to the server code, that is C++23 requirements, coroutines, drogon orm/view and so on
• The idea approach on what we aim to solve with an "Offline mod administration panel" and how it should be done
• Move the list of TODOs inside separate issues