Simple funds contributing page/dialog

[Balaji-Ganesh]

• Shall this be a dialog (Modal component in MUI) or a new page..?? 🤔 🤔

• Uses #10 to pop this up.

• Provide button to connect wallet.

• In next iteration..

• Making it to work like as decided in sequence diagram.

[Balaji-Ganesh]

Integrated in Campaign page -- checkout #10