add keyword management to control panel

[TanyaStere42]

Context: This is just a story to create natural access within the web app to keyword management.

Final design: https://www.figma.com/file/TfpDVirbMc3K8ctrVxVBFI/Codex%3A-keyword-edit?node-id=148-9094&t=P6QjPziL0OvosqsZ-0

User Story

As an administrator on the admin console, I can access a page that allows for keyword and data management

url: /settings/keywords

QA:

• Visit the control panel; make sure the button is labeled “Manage Keywords”
• Click the button; make sure you are navigated to the manage keywords page (check breadcrumbs/url)