Document functionality and interfaces

[trungnt2910]

Document things that are potentially useful for Pico driver developers:

lxmonika behavior

• Offset database and fallback heuristics.
• Pico provider registration.
• Dispatcher (Process/thread creation/termination, process/thread contexts, "parent" providers).
• Interactions with lxcore.
• /dev/reality and \Device\Reality.
• Transparency & compatibility issues.
• Additional Pico callbacks.

NT Pico processes internals

• \Device\ConDrv\KernelConnect.
• API changes since circa 2016 (when thinkcz's Pico toolbox was created).
• Pico process/thread lifetime (process switching on exec, thread cleanup using APCs, etc...).
• MEM_DOS_LIM and Pico processes.
• How Core Boot drivers are loaded.
• Pico ABI changes throughout the ages.