Only existing GDScript code examples are converted and added to the
docs.
This is the first batch include classes beginning with A and B.
Included classes:
* AcceptDialog
* AESContext
* Animation
* AnimationNodeStateMachine
* AnimationNodeStateMachinePlayback
* AnimationNodeStateMachineTransition
* Array
* ArrayMesh
* AStar
* AStar2D
* Bool
* Button