Add documentation to files

[notSanil]

A lot of code has been written however the documentation is really lacking, this can make it hard to understand some of the more deeply nested widgets.

• Add widget documentation
• Add model documentation
• Add route documentation

[Amitkumarkoli]

can I work on this, is u r active on this?

and also open new issues in this, any restrictions for new issues?

[tanayduddalwar]

@notSanil please assign me this issue