[FEATURE] Bulk Data Upload

[DMalone87]

Is your feature request related to a problem? Please describe.
Currently, our API only supports the creation of a single incident at a time. In the future, we may have users who need to upload batched datasets of incidents all at once rather than attempting to make each of them one by one. We should develop an API endpoint that allows a user to upload a large set of entries all at once.

Describe the solution you'd like
Create an additional API endpoint that allows a user to upload a large number of incident entries all at once.

Describe alternatives you've considered
The alternative here would be to upload entries serially; one by one.

Additional context
This task should only be undertaken once Issue #278 has been completed. It is also a key part of completing Issue #277