feat(reports): add `report funding`

As part of #235, we want to be able to source information about the
packages we depend on which are looking for financial support.

We want to introduce a report for this data, in both the web and CLI,
which produces all dependencies that are looking for funding, as well as
ordering it by how widespread the dependency is in the codebases
dependency-management-data knows about, as a good indication of
priority.

Unfortunately, due to the way that we're using a subquery, we need to
manually manage the SQL + querying as `sqlc` crashes.

Fortunately, this isn't too awkward a query and shouldn't change too
often.