Add support to filtering projects by multiple full paths on GraphQL
Proposal
The GraphQL resolver for projects now supports finding projects by multiple IDs. It'd be useful to also allow users to finding projects by multiple full paths.
One example usage is this one: https://github.com/lucavallin/first-issue/issues/207
On first-issue I had to use the project id to be able to query multiple projects at the same time in order to reduce the number of API calls. Using the project it though is not very user friendly.