Add pages and models for scheduling and viewing runs

[kungpaogao]

Progress tracking

• merge changes from master
• create components from mockups in Figma
  • run preview page
  • run preview component
  • run detail page
• define data models
  • runs
  • clients
• build queries for batch updating furniture
• create function to generate unique/shareable URLs for runs
• create UI to create and add to run (Use shopping cart to create runs #66)

Relevant branches

• https://github.com/n2n-milstein/inventory/tree/kira/runs
• https://github.com/n2n-milstein/inventory/tree/kungpaogao/batch-update
• https://github.com/n2n-milstein/inventory/tree/kungpaogao/run-details

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Original comment

We need pages for:

• displaying individual run - details + ability to change status of live runs
• showing lists of past runs - can click in to view details and potentially have graphs / metrics

We need to define a "run" model as well that we can store in Firebase and use in our frontend. Things we need to track:

• dates/times - date of the run, date created/updated
• list of furniture IDs - links furniture to a run
  • used to request furniture info (donor address, contact info, furniture type)
• driver/volunteer info - show who's volunteering for the run
• client info - who's receiving the furniture

Comment other information we might need :)

[kungpaogao]

Updated comment to show progress and break down the necessary changes for runs.

[kungpaogao]

See #66 for an idea of how to create runs using our interface.