Initial-Barcharts-and-pieCharts-added

[SURAJ-SHARMA27]

Fix cBioPortal/cbioportal# (see https://help.github.com/en/articles/closing-issues-using-keywords)

Describe changes proposed in this pull request:

Created a custom tab in studyViewPage.tsx, which includes functionalities for bar chart and pie chart plots.

1. First, retrieved the molecular profile IDs by resolving the fetchMolecularProfilesUsingPOST promise.
2. Obtained all the profiled samples by resolving the fetchGenePanelDataInMultipleMolecularProfilesUsingPOST promise.
3. Used the fetchGenericAssayDataBinCountsUsingPOST promise to generate bar plots.

Any screenshots or GIFs?

screen-capture (3).webm

screen-capture (4).webm

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Read our Pull request merging policy. It can help to figure out who worked on the file before you. Please use git blame <filename> to determine that and notify them either through slack or by assigning them as a reviewer on the PR screen-capture (3).webm G1__Single_cell_-_cell_cycle_phase_values.txt