JS - View 7 Day Revenue

# User Story
As a user I want to be able to see what the revenue is for my restaurant over a 7 day period.

# Acceptance Criteria
WHEN the user visits the reporting page
THEN the user should be able to see revenue for a specific 7 day period

# Dependencies
- #88

# Dev Notes
- Will need to pull in final bills for all reservations within the selected date range.