Toggle Gear Shift Mode v1.0.0.1

Toggle Gear Shift Mode — quickly switch your player gear shift mode between Automatic and Manual using a single key. Small on-screen HUD shows the current mode.

Changelog Version (1.0.0.1):
- Added per-vehicle-type offset for the lower-right HUD to avoid overlaps on non-standard vehicles.
- Improved robustness: safer access to game/spec tables and UI helpers to reduce runtime errors with mod vehicles.
- Minor refactors and code cleanup (no behavior changes to the toggle input).
- HUD now correctly respects in‑game HUD visibility (won’t show when the main game UI is hidden). 

Features
- Single-key toggle (default: DEL).
- Player-global setting: chosen gear mode applies to the player across all vehicles.
- Small lower-right HUD and top-left F1 helper text showing current mode.