Support for 10-year IceCube public point-source data

What's Changed

• Adds support for time-integrated point source analyses with the 10-year public data release from the IceCube Collaboration.

  • A tutorial describing how to work with the public 10-year IceCube point-source data is available here: https://icecube.github.io/skyllh/master/html/tutorials/publicdata_ps.html

• Initial support for time-dependent analyses was added using expectation-maximization method.

New Contributors

• @mskarl made their first contribution in #122

Full Changelog: v22_04_28...v23.1.0