[ZDI-193] Collect `shareId` for cloud documents

Change description

With this PR, we are starting to collect the cloudShare identifier and passing it onto the Mac App as a new directive, so the Mac App will be able to reproduce and display the URL to the original cloud file.

Type of change

[ ] Bug fix (fixes an issue)
[x] New feature (adds functionality)

Related issues

Fix ZDI-193

Checklists

Development

[ ] Lint rules pass locally
[x] Application changes have been tested thoroughly
[ ] Automated tests covering modified code pass

Security

[x] Security impact of change has been considered
[x] Code follows company security practices and guidelines

Code review

[x] Pull request has a descriptive title and context useful to a reviewer. Screenshots or screencasts are attached as necessary
[x] "Ready for review" label attached and reviewers assigned
[ ] Changes have been reviewed by at least one other contributor
[x] Pull request linked to task tracker where applicable

zeplin / zeplin-sketch-plugin

[ZDI-193] Collect `shareId` for cloud documents #53