This merge adds a complete plugin management system (FN-3565) with CLI commands, a loader, runner, and dashboard routes, along with project-scoped auth storage (FN-3544), native shell connection support for mobile (FN-3400) spanning onboarding, connection manager, and remote desktop handoff, and ref
Fusion-Task-Id: FN-3400
Removes the standalone `DesktopShellBootstrap` component from the desktop package, routing desktop remote mode into the shell onboarding flow instead. Updates the corresponding test file to reflect the component removal and adjusts the README.
Fusion-Task-Id: FN-3399
The merge lands Step 7 of FN-3398, adding documentation and delivery artifacts across the mobile and desktop packages with updated READMEs, mobile-specific docs, and architecture references.
Fusion-Task-Id: FN-3398
