Add support for creating new trees

[grantfitzsimmons]

The Storage tree will need to be created upon the creation of the institution.

In Specify 7, there is not yet a mechanism for creating a new discipline, but when one is added it will be important to allow users to create new trees (Taxon, Geography, LithoStrat, and ChronoStrat).

In Specify 6, users have the option to either import taxonomy from one of our source data spreadsheets (mostly sourced from Catalogue of Life) or to populate the tree themselves after creating the discipline.

For Taxon trees, we need to build a utility for users so that they can easily import data sourced from external sites like GBIF, Catalogue of Life, ITIS, WoRMS, etc. when creating a new discipline.

Workflow:

1. User initiates the creation of a new tree (either automatically when the database is created, when creating a new discipline, or when creating a new tree within a single discipline for Add support for 'Multiple Object Types' #4640)
2. [Taxon only] User chooses the discipline type to set the default ranks
3. User configures the tree, indicating which ranks are included, enforced, included in the full name, and what the separator is between each.
   
4. [Taxon only] User chooses whether or not they want to use our default tree data for that tree.
5. The tree is created at the appropriate scope.