Enhance documentation for SetLaunchControlEnabled (#1298)

* Enhance documentation for SetLaunchControlEnabled

Added detailed description of the effects when Arena Mode is enabled, including changes to vehicle handling and damage.

* Use docs format

---------

Co-authored-by: Dillon Skaggs <dillon@dillonskaggs.dev>

Author: microoowave

PHYSICS/SetLaunchControlEnabled.md

@@ -8,8 +8,17 @@ aliases: ["0xAA6A6098851C396F"]
 // 0xAA6A6098851C396F
 void _SET_LAUNCH_CONTROL_ENABLED(BOOL toggle);
 ```
+Toggles "Arena Mode", a global flag that affects physics, damage, and handling for all vehicles.
 
-Related to the lower-end of a vehicles fTractionCurve, e.g., from standing starts and acceleration from low/zero speeds.
+When enabled:
+
+* fTractionLossMult is multiplied by 0.25, increasing grip significantly.
+* Mid-air vehicle control rotation force is increased by 50%.
+* Vehicles explode immediately when body health reaches 0.
+* Disables chain-reaction explosions for nearby vehicles.
+* Prevents engine damage from colliding with Ramp Cars.
+* Overrides the Stunt Mode ([`N_0x9ebd751e5787baf2`](#_0x9EBD751E5787BAF2)) collision protection.
+* Reduces the chance of falling off bikes/quads.
 
 ```
 NativeDB Introduced: v1604