[New CDot Nav] Create empty Billing Account Settings page
**Design** :art: [Figma](https://www.figma.com/file/iCqd9J7DOCTS7Q3CDcKdPX/Navigation-for-CDot-to-represent-User%2FBillingAccount-data-structure?type=design&node-id=291-27946&t=Pkzdn1febtrVXbhz-0) **Implementation** - Create a new blank page to house the Billing Account Settings information - Create a sidebar item linking to the new page
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