Publish version 4 to conda-forge or robostack

[pipinet]

pixi add xxxxx

can not found version 4 in https://prefix.dev/channels

[tony-p]

https://github.com/BehaviorTree/BehaviorTree.CPP/discussions/644

Note anyone (not just package maintainers) can create recipes to package projects for conda-forge and/or robostack. This is because they pull the repo and then package it (you don't push pre-compiled packages to conda-forge and typically don't for robostack).