Add default/required fields to the template

Problem/Motivation

Different entities and bundles may have some required fields (name, status, timestamp, land type, etc).

It is probably easiest if we just add these fields by default when creating the template.

Steps to reproduce

N/A

Proposed resolution

Create template fields for required entity fields.

Remaining tasks

Implement

User interface changes

None - some fields will be added by default.

API changes

None

Data model changes

None