feat:Added new organization onboarding UI and associated tests

[GuillermoFloresV]

Checklist:

• [x] I have read freeCodeCamp's contribution guidelines.
• [x] My pull request has a descriptive title (not a vague title like Update index.md)

Closes #494

Per conversation with Mrugesh, we have decided to add the ability to create organizations to Classroom Mode. This will take a bit of work, including adding orgs to our DB, this PR adds our base UI to create this new feature.

New onboarding page (/onboarding/neworganization) :

Onboarding Modal UI: This shows the dropdown menu that comes up to select the type of organization This shows an additional input tag that displays when the user picks "other"

[GuillermoFloresV]

I need to add a snapshot test for our new onboarding page (/onboarding/neworganization). This plus a few more things to clean up and the PR will be ready to go.

Currently planning to be done with this by: 10/12/2023