Dataset Type selection step in Create Dataset page

[g-saracca]

What this PR does / why we need it:

Following up on @pdurbin's work in #845, this PR updates how users select the dataset type in the dataset creation flow.
For now, we’ve hardcoded the dataset type descriptions (“dataset” and “review”) as a temporary solution until the new field is added.
This is the first step toward supporting dataset types in the SPA, more enhancements coming soon.

Storybook links:

• Create Dataset page with Dataset Type selector
• Edit Dataset page with readonly Dataset Type field.

Which issue(s) this PR closes:

• Closes Allow for the creation of various dataset types #797

Special notes for your reviewer:

Suggestions on how to test this:

1. Login within the SPA and navigate to the Create Dataset page.
2. By default only one dataset type exists('dataset' type) so you won't see a Dataset Type selector.
3. Add a new dataset type with:

curl -H "X-Dataverse-key:$API_TOKEN" -H "Content-Type: application/json" "http://localhost:8080/api/datasets/datasetTypes" -X POST -d '{"name":"review","linkedMetadataBlocks":["geospatial"]}'

4. Navigate again to the Create Dataset Page and now you will see a Dataset Type selector.
5. Select "Review" and create the dataset.
6. Go to edit the recently created dataset and you will se a Dataset Type readonly field with the value of "Review".

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

Yes.

Create Dataset Page, Dataset Type selector.

Edit Dataset Page, Dataset Type readonly field.

Is there a release notes or changelog update needed for this change?:

Not for now, might be good to add it after work related to dataset types is done.

Additional documentation:

[coveralls]

coverage: 97.736% (-0.09%) from 97.823%
when pulling 44aaa4f on 797-dataset-type-selection-step
into e1957ab on develop.

[pdurbin]

For now, we’ve hardcoded the dataset type descriptions (“dataset” and “review”) as a temporary solution until the new field is added.

As I mentioned at standup I added the "waiting" label until we've addressed the above. I'll hold on to this issue.

Thanks for the PR, @g-saracca! It looks great!