feat: fetch single resource by resource id

[shavidze]

Problem

There is no way atm to fetch a single resource via API. This would be useful for #1082 and #1072

Solution

Fetch a single resource by ID

Checklist

• Code follows the contributing guidelines
• Changes have been thoroughly tested
• Documentation has been updated, if necessary
• Any dependencies have been added to the project, if necessary

Reviewers

@[username of the reviewer]

[mlabouardy]

All good!