Add option to query OBS repo by package rather than binary name.

[sp1ritCS]

Is your feature request related to a problem? Please describe.
It could be useful showing all "binaries" (so packages + their subpackages) from a single link. Rather than linking all of them separately. If for example you try to download a library by pressing the "Download package" button, software-o-o will only show the sourcepackage (or in case of a dpkg package, nothing)

Describe the solution you'd like
Add a http request param that let's me query by package rather than name.

- curl -u user:pass "https://api.opensuse.org/search/published/binary/id?match=project='home:sp1rit'+and+name='clatexmath'"
+ curl -u user:pass "https://api.opensuse.org/search/published/binary/id?match=project='home:sp1rit'+and+package='clatexmath'"

software-o-o should then offer all packages as download (not sure how to implement that visually, esp. since it'd be great to have them in logical groups [e.g. libname-dev (dpkg) and name-devel (rpm) could be considered the "same" package ])

Describe alternatives you've considered
Linking each (sub-) package individually

Additional context

[hellcp]

Technically you can already do that, by searching for source packages, since those will represent the obs package objects

[sp1ritCS]

yes, that is also what the "download package" button on OBS does, but:

1. that doesn't work for non rpm packages
2. it isn't ideal when you just want to present users with a graphical overview of all available packages