Pr21 and 22 combined

[HibaBenAribi]

Updates

• separate helper functions from the main function
• add internal data
• remove directory dependencies
• added new diseases + filter only neurological
• updated first tab UI
• updated dependencies

In readme

• added diseases list + demo command line

To Do

• specify packages version
• add licence file

Remaining errors :

• in cox tab : the multimodal model without SV second table and plot are not functional due to error associated with these two variable : "cox_reg.mul1" and "res.std_mul1"