Group Comparison - Generic Assay Categorical and Binary data implementation

The objective of this project is to improve the functionality of cBioPortal by introducing support for categorical and binary data analysis and visualization in the Generic Assay format. The project involves implementing new services and controllers in the backend to provide the needed GenericAssayData for the frontend. The frontend will support features to allow users to perform Fisher's exact test for binary data and chi-square test for categorical data, and to view the results in a clear and easy-to-understand bar chart and table format. In addition, end-to-end tests will be added to ensure the feature works as expected. Dliverables include wrapped and tested visualization functionalities in comparison page and comparison tab in results.