Complete the front-end portions for dataset upload, selecting ML models and hyperparameters

[ruokun-niu]

• Users should be able to click on the "upload" button to upload their datasets (in csv format).
• There should be an array of checkboxes that allows the users to select their preffered ML models
• There should be an array of text input fields that allows the users to modify the values of the hyperparameters

[JackyXu-Cool]

This has been done. Only thing left is to add a new upload stage for user to upload their y labels to get ML model accuracy. But that is a new requirement discussed with Tommy. Will create another issue to resolve that.

[ruokun-niu]

I have already created an issue for that #23