feat: add animations for minimizing, unminimizing and scratchpad

[eestsoftware]

#450
Adds animations that play when a window is minimized, restored from being minimized, or the scratchpad is toggled. Uses the same animation types as open and close, (i.e. slide, zoom, fade, none).

Defined in config.conf:

animation_type_unminimize=zoom (default)
animation_type_minimize=fade (default)

animation_duration_unminimize=350 (default)
animation_duration_minimize=300 (default)

animation_curve_unminimize=0.46,1.0,0.29,0.99 (default)
animation_curve_minimize=0.46,1.0,0.29,0.99 (default

Animation types can also be applied for window rules, and work with the isnoanimation flag, (which, side-note, is pretty buggy right now)