[ImageLab React]: Organized the folder structure and added react routing.

[achyutagupta]

Description

Organized the folder structure by deletion of files of no use.
Implement react routing methods to build several other components like : Dashboard , Profile , Login and Signup.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)
• This change requires a documentation update

How Has This Been Tested?

run the code in browser and change the path
'/workspace' :- Workspace
'/dashboard' :- Dashboard

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules