Immersive Aircraft: Realistic Takeoff

REALISTIC TAKEOFF 2.0.2

Critical fix
------------
- Fixed aircraft remaining permanently stuck in RUNWAY ROLL after leaving a
  short, raised, or interrupted runway before the runway timer completed.
- Confirmed airborne departure now restores normal flight control within a
  short one-to-three-tick contact-loss filter.
- Removed the forced downward-velocity behavior that made recovery from an
  elevated runway nearly impossible.
- Low-speed drops also release directly to normal flight instead of applying
  the staged liftoff restrictions.

Takeoff improvements
--------------------
- Runway progress now uses speed projected along the aircraft's forward
  direction.
- Sideways sliding and backward movement no longer count as takeoff speed.
- Added a performance-based rotation gate for aircraft that genuinely reach
  their calculated rotation speed before the adaptive timer finishes.
- Runway unlock remains active once earned instead of reverting after a
  temporary speed change.
- Smoothed rotation progress to reduce abrupt control-authority changes.
- Increased useful pitch, yaw, and thrust-pitch authority during rotation,
  liftoff, and initial climb.
- The HUD now labels the measured runway speed as FWD.