Make org picker functional

[echappen]

Changes proposed in this pull request:

• Adds org picker component to org-related pages and makes it functional

How to test

1. Log into cloudfoundry through the CLI
2. Start a server using an updated cloud foundry token: npm run dev-cf

Switching orgs

3. Navigate to an org-related page (like a manage users page)
4. Open org picker and select another org
5. New page should be an equivalent page to previous org

Viewing all orgs

1. Navigate to an org-related page (like a manage users page)
2. Open org picker and select "view all organizations"
3. Should navigate you to /orgs

Screenshots

On Manage Users page

Related issues

Closes #410
Unblocks #408

Submitter checklist

• Added logging is not capturing sensitive data and is set to an appropriate level (DEBUG vs INFO etc)
• Updated relevant documentation (README, ADRs, explainers, diagrams)

Security considerations

None

[beepdotgov]

Left a couple comments, but this is looking very good. Thanks for wiring this up so quickly, @echappen!

[beepdotgov]

Looks great to me! 🚀🎉

[echappen]

@cannandev This is ready for a dev review whenever you're able

[cannandev]

So awesome to see this come to life! LGTM 🚀