implement centerOfMass feature#221

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tiinsy wants to merge 3 commits intodartclub:mainfrom

deanpapas:feature-centerOfMass

Commits on Apr 15, 2025

implement centerOfMass, and test features
tiinsy
committed

Commits on May 2, 2025

fixed PR changes
tiinsy
committed

Commits on Jun 2, 2025

added comments to implementation of center_of_mass
tiinsy
committed