Implemented Steering procedures:
- `st1` - Steer directly to goal, no constraints.
- `st2` - Steer with maximum turning radius and direction in mind.
- `st3` - Reeds and Shepp steer procedure.
- `st4` - Very basic closed-loop simulator.
Implemented Steering procedures:
- `st1` - Steer directly to goal, no constraints.
- `st2` - Steer with maximum turning radius and direction in mind.
- `st3` - Reeds and Shepp steer procedure.
- `st4` - Very basic closed-loop simulator.