add disable picking

[akaszynski]

Resolve #1069 by adding a method to PickingHelper to disable picking.

Example usage:

import pyvista as pv
mesh = pv.Sphere(center=(1, 0, 0))
cube = pv.Cube()
pl = pv.Plotter()
_ = pl.add_mesh(mesh)
_ = pl.add_mesh(cube)
_ = pl.enable_mesh_picking(left_clicking=False)

# or
# _ = pl.enable_surface_picking(left_clicking=True)
# _ = pl.enable_point_picking(left_clicking=True)

pl.disable_picking()
pl.show()

[codecov]

Codecov Report

Merging #2450 (3613f24) into main (67984ea) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #2450   +/-   ##
=======================================
  Coverage   93.64%   93.65%           
=======================================
  Files          74       74           
  Lines       16002    16016   +14     
=======================================
+ Hits        14985    14999   +14     
  Misses       1017     1017