Create a gradle task to fetch dcf file

[HooHaa-code]

As a CI/CD node, I would like a way to fetch and place the dcf file so I can run CI/CD tasks with the need of fetching the latest dcf file from the target hardware

The only way I know to obtain the dcf file now is to manually pull it from a target device that has fetched the document after running the app. This solution is not ideal for CI/CD systems.

[iamralpht]

@timothyfroehlich Can you link to our task that does this for the test files?

[timothyfroehlich]

We have some somewhat one-off code that does it for our Validation tests. The test that fetches the files is here and it depends on an unpublished Gradle plugin here.

We previously considered making this easy for users of DesignCompose (#273, #275) but they've been in the backlog since last year. Happy to work on them if we want to prioritize them again.