React Client Improvements

[sagar-wal]

• [x] Use prettier linter. Add this in .vscode/settings.json
• [ ] You have hardcoded width of div example 500px, 300px, etc. this design is not responsive. Instead use https://mui.com/material-ui/react-grid/#basic-grid to enable responsive design for different resolution screens
• [ ] Use yup validation making name, sex, dob as required and email should be a valid email before submission.
• [x] After form submission, if success, using useState and Mui Alert show message Successfully saved patient.
• [x] In form submission, display red alertbox with message if backend POST reqeust returns error. Ref https://stackoverflow.com/a/38236296

[sagar-wal]

Subtask : Minimise use of ‘any’ and ‘as any’. Use typescript types as maximum possible