This PR is handles the changes required to support envelopes. The new
envelope editor/signing page will be hidden during release.
The core changes here is to migrate the documents and templates model to
a centralized envelopes model.
Even though Documents and Templates are removed, from the user
perspective they will still exist as we remap envelopes to documents and
templates.
## Description
I added the option of downloading a document without the signing
certificate for teams. They can disable/enable the option in the
preferences tab.
The signing certificate can still be downloaded separately from the
`logs` page.
## Description
Adds user management capabilities to our current API. Allows for adding,
removing, listing and updating members of a given team using a valid API
token.
## Related Issue
N/A
## Changes Made
- Added an endpoint for inviting a team member
- Added an endpoint for removing a team member
- Added an endpoint for updating a team member
- Added an endpoint for listing team members
## Testing Performed
Tests were written for this feature request
