add admonishments for 0 vs 1-indexed column starts

[owlang]

Add admonishments to describe things that are 0 vs 1 indexed (CDT/Matrix file format row start and column starts) to relevant tools:

• Aggregate Data (Read Analysis)
• Scale Matrix (Read Analysis)
• Sort BED (Coordinate Manipulation)
• Sort GFF (Coordinate Manipulation)
• Two-color Heatmap (Figure Generation)
• Three-color Heatmap (Figure Generation)
• CDT to Composite