Docs: assorted corrections and clarifications
Multiple documentation edits to correct values, clarify behavior, and tighten wording across the wiki. Notable changes: update installer/localization counts; clarify Backgroundog audio/timing fields and media-session semantics; add Cache subfolders (SignalT, Content) and cache details; fix memory unit reporting (GiB) and other unit notes; adjust many settings defaults (BackdropType=None, Update: Server=Soferity, Module=Downloader, Extension=Executable, AutoType default); document silent-uninstall is broken; refine engine/config filenames and mpv defaults; various UX/command/alias clarifications and minor wording fixes.
Add uninstall screenshots and embed in docs
Add two new images (.images/Undo-Internals.png and .images/Uninstalling-Sucrose.png) and embed them into Undo-Internals.md and Uninstalling-Sucrose.md, replacing the screenshot placeholder lines with proper image links. This documents the uninstall confirmation dialog and the Windows Installed apps entry.
Add mermaid diagrams to architecture and internals docs
Embed mermaid flow/sequence diagrams across multiple documentation pages to visualize multi-process flows and lifecycle behaviour. Files updated: Architecture-Overview.md, Backgroundog-Service.md, Command-Reference.md, Crash-Reporting.md, IPC.md, Lifecycle.md, Undo-Internals.md, Update-Internals.md. Diagrams illustrate who-spawns-whom, Backgroundog lifecycle and data pump, command-bus flow, crash/reporting flow, IPC transports, cold-start sequence, uninstall removal sequence, and update pipeline. Improves developer clarity by providing visual references for existing textual descriptions.