Added matched true track kinematics to reconstructed HFS particles to HFSTree

[cpecar]

Briefly, what does this PR introduce?

For ease of SIDIS kinematic reconstruction studies, added the matched true track momentum to the output of HFS tree. This isn't the full true hadronic final state, just the true momenta of reconstructed tracks.

Also added a different function to fill HFSTree variables. Was previously included as part of Kinematics::AddToHFS

What kind of change does this PR introduce?

• [ ] Bug fix (issue #__)
• [X] New feature (issue #__)
• [ ] Documentation update
• [ ] Other: __

Please check if this PR fulfills the following:

• [ ] Tests for the changes have been added
• [ ] Documentation has been added / updated
• [ ] Changes have been communicated to collaborators

Does this PR introduce breaking changes? What changes might users need to make to their code?

No.

Does this PR change default behavior?

No.

[cpecar]

Changed this to just adding the selected single hadron reconstructed and true four momentum for the selected final state (e.g. pi+ tracks), rather than all the true associations, which should make it more clear.

[c-dilks]

Ready for review?

[cpecar]

Yes, should be ready.

[cpecar]

Sorry, added one more commit to have an example macro if needed.