Split Shapes Layer Randomly
shapes_tools
QgsProcessingParameterFeatureSource|SHAPES|Shapes|-1|None|False
QgsProcessingParameterNumber|PERCENT|Split ratio (%)|QgsProcessingParameterNumber.Integer|50|False|0|100
QgsProcessingParameterBoolean|EXACT       |Split exactly|True
OutputVector|A|Group A
OutputVector|B|Group B