add a smooth/lerp version of look_at() function

[hasan-bro-coder]

My proposal is very simple and easy
Add a new version of look_at function called look_at_smoothly or smth like that
which will take 2 parameters
object position and delta

This is my solution in GDScript

func look_at_smoothly(point: Vector2,delta: float) -> void:
   rotation = lerp_angle(rotation,atan2(position.y - point.y,position.x - point.x),delta)

You guys just need to turn it into a C++ function 😊

[Calinou]

• Related to Provide a smooth move_toward #9803.