Add Span Start/End Trimming Class Functionality

[gandersen101]

Add pipeline component to "clean" entities after setting (primarily intended for spaczz entities). I.e. if punctuation is included at the start/end of a fuzzy matched entity the span can be trimmed to remove punctuation.

Will also require registering a custom span attribute on entities created through spaczz.

[gandersen101]

Keep going back and forth on this, but decided this will not be a pipeline component but will be inherited by the fuzzy searcher and regex searcher.

[gandersen101]

Ultimately will not work on this.