feature request: support multiple aggregations at the root for the same project

[kenyee]

E.g., I want separate Dokka html report/site for all "api" modules for general API documentation for the app.
And a different Dokka report for "all android device tests" to document what tests do.
And a different Dokka report for "all unit device tests" to document what tests do.
And a different one for "test framework which is a bunch of different modules as well a subset of a module".

[kenyee]

nvm...this might be a documentation issue...looks like we can create separate a new gradle module for each aggregation :-)