Frontend - Hotfix - change naming of business username in localStorage

[kliu57]

right now both business and customer username is stored as "username" in localStorage

After this change is made:

• Everyone needs to make the corresponding changes in their code
• If your page is using the field "username" from localStorage, you need to edit the code since that field will be now called something else.

[kliu57]

business stored as business-username

customer stored as customer-username

[kliu57]

• admin incoming orders page (katie)
• dashboard (kevin)
• edit menu (vivy)

[kliu57]

kevin completed this task