Create Attachment Package

[G Roques]

The attachment package handles attachment logic between parts.

For example, attaching axes to a frame, extruder to top X axis, or heated bed to frame and axis.

• get_axis_frame_attachment_kwargs.py
  • get_placement_strategy.py
• get_extruder_x_axis_carriage_attachment_kwargs.py
• get_heated_bed_frame_attachment_kwargs.py
• get_default_axis_creation_kwargs??