clientside mixins in common section

[Linguardium]

https://github.com/Slomaxonical-907/Architects-Palette-Fabric/blob/7a8fb2bef88730fb53eb4032d19f3f0de1af618b/src/main/resources/architectspalette.mixins.json#L11C1-L12

client side mixins should be in the client section of the mixin config