docs(wiki): initialize comprehensive project wiki content This commit provisions the GitHub Wiki with the full suite of documentation, architectural specs, and user guides synthesized from the RustyNES v1.0.0 codebase. - Structures the navigation via a custom _Sidebar.md and _Footer.md, organizing pages by RustyNES, Architecture, Features & Systems, Platforms, and References. - Documents the cycle-accurate lockstep scheduler, 2C02 PPU, 2A03 CPU, and APU mixer. - Details the multi-platform architecture (winit + wgpu + egui + cpal frontend), Libretro core integration, and mobile/hybrid host layers. - Exposes developer and user documentation (Getting Started, Building from Source, Netplay & Rollback, Scripting Engine). - Reconciles historical research and reference materials (ref-docs/) into the Reference-Materials.md index. - Catalogues all deferred and carryover features, as well as Architecture Decision Records (ADRs).

doublegate committed Jun 29, 2026