Prettier Url on Collection Page

[g-saracca]

Overview of the Feature Request
Currently the url of a specific collection looks like this:
https://beta.dataverse.org/spa/collections?id=[collectionIdentifier].
The idea is to change the query param to a path param so that it looks like this:
https://beta.dataverse.org/spa/collections/[collectionIdentifier]

Note that we have to change the way we read the alias/identifier of the collection from the url, how we navigate to an specific collection, and also change the placeholder of the Identifier field in the New Collection Page.

What kind of user is the feature intended for?
All users