feat: integrate initial MFC simulation UI

[abbccdd]

Summary

• add editable L/N/K/S/T, duration, passenger rate, speed, and seed parameters
• add Start, Pause, Resume, and Reset lifecycle controls with state-aware enablement
• drive Simulation with a 33 ms MFC timer and steady-clock real delta sampling
• display live elevator, floor, Hall Call, model-time, and statistics snapshots
• document the initial MFC integration and DeferredCapacity display TODO

Validation

• Debug x64: 0 warnings, 0 errors
• Release x64: 0 warnings, 0 errors
• Debug x86: 0 warnings, 0 errors
• Release x86: 0 warnings, 0 errors
• Core Smoke: 406 checks passed on x64 and x86
• Core All: 150 scenarios / 2,680 checks passed on x64 and x86
• manual UI: default run, live snapshots, Pause/Resume without wall-clock injection, Running/Finished Reset, second Start after Reset, invalid L/N/K/S, x10 speed, and Finished retention passed

Scope

• Core, Statistics, and Tests are unchanged
• no dispatcher, elevator, or simulation algorithm changes
• DeferredCapacity remains shown as unassigned because the public snapshot does not expose a separate state