Adds the ability to specify an optional signing order for documents.
When specified a document will be considered sequential with recipients
only being allowed to sign in the order that they were specified in.
## Description
Adds the external ID column to documents and templates with an option to
configure it in the API or UI.
External ID's can be used to link a document or template to an external
system and identify them via webhooks, etc.
## Description
General enhancements for templates.
## Changes Made
Added the following changes to the template flow:
- Allow adding document meta settings
- Allow adding email settings
- Allow adding document access & action authentication
- Allow adding recipient action authentication
- Save the state between template steps similar to how it works for
documents
Other changes:
- Extract common fields between document and template flows
- Remove the title field from "Use template" since we now have it as
part of the template flow
- Add new API endpoint for generating templates
## Testing Performed
Added E2E tests for templates and creating documents from templates
