docs: link PSP threading research from documentation index
docs: add PSP threading semantics research
docs: improve Wiki navigation and visual hierarchy
docs: align Wiki status and platform guidance
Remove unavailable generated-output tree link
Create compact project manual sidebar
Create FAQ manual page
Create Research and Documentation manual page
Create Publication and Provenance manual page
Create Contributing manual page
Create Development Workflow manual page
Create Hardware Research manual page
Create Debugging manual page
Create Verification and Testing manual page
Create Audio and Media manual page
Create Graphics and Display manual page
Create Runtime and HLE manual page
Create Static Recompiler manual page
Create Architecture manual page
Create Repository Tour manual page
Create Build and Run manual page
Create Getting Started manual page
Create project manual Home