[DSM-179] Implement CSV Exports UI

[goldsmithb]

Jira Ticket

---

This PR is for the UI Pages associated with CSV Exports.

/csv_exports - Export Summaries Table

• A server-paginated table that displays the CSV exports associated with the user (shows all of them if admin)

/csv_exports/:id - Export Details Page

• A page for viewing the details of a csv export
• renders the selection (export paths) as a client-paginated table with page size of 50

Tests

Route tests are included for the above new pages in app/javascript/src/app/routes/__tests__/

Other changes and things to note

• Renamed 'objects' to 'files' and 'directories' to 'folders'
• Added two sign in options for development environment: 'admin' and 'user'
• Pass omniauth sign-in data to react app through custom root element data attributes --- allows us to create dynamic sign-in & out links based on the environment -- we render a form for sign-out just like we would in a rails view
• create utilities to grab and set CSRF token headers for API requests that require it to be included (non-read actions, usually)
• Created a navbar in the React app with links to the s3 browser and csv export table
• Moved sign out link from rails view to react navbar
• Moved the Notifications component to a root layout that renders within the router context -- allows us to use react router links within notifications (in this PR, a link to view a csv export that was just ordered).
• Added support for server-side pagination to the generic table builder component
• renamed the ObjectDetailField component to just DetailField because it is reused in csv export details view
• I included code that can use a perPage URL search param when getting server-paginated data, but it currently is ignored. If we want to allow this in the future it is there (but I could also remove it if we think it's unnecessary).
• reset selection store state when an export is successfully requested
• removed code that supported displaying entire bucket selection (not allowed)