Show user's projects in user list view

[landonreed]

Checklist

• Appropriate branch selected (all PRs must first be merged to dev before they can be merged to master)
• Any modified or new methods or classes have helpful JSDoc and code is thoroughly commented
• The description lists all applicable issues this PR seeks to resolve
• The description lists any configuration setting(s) that differ from the default settings
• All tests and CI builds passing

Description

Fixes #622 by adding labels to user rows to indicate project permissions. Change is visible at https://gtfs-dev.ibi-transit.com/admin/users. The cases handled now are:

• application admin
• organization admin (mostly unused)
• 🆕 list of projects user has (does not distinguish between admin/custom permissions)
• 🆕 indication that user has no projects
• 🆕 indication that user has projects that are missing from the database (either deleted or belonging to another Data Tools instance)