This PR majorly refactors PEDS Associated Methods to work like q2-boots.

• Refactor Peds-sims to incorp boots (1d035f0)
• refactor peds to be able to run boots (a649ea2)
• refactor pprs to be able to run boots (423f44e)
• move helper methods into utils (bd96ddb)
• remove missing-timepoints filter and move to heatmap and not required(68bea7a)
• remove missing subjects and move to heatmap and not required (68bea7a)
• add usage example for heatmap (2508a65 and ceb45b8)
• add usage example for peds (71a19d4 and eb26eb1)
• use q2-stats json_replace(c46ad4f) (This commit also updates q2-fmt to be compatible with the new stats changes 🎉 )

closes #100
closes #85
closes #97
closes #94
closes #93