[labs] Add vibronic Trotter template

[dwierichs]

Context:
We want to implement time evolution under a vibronic Hamiltonian as specified in Motlagh et al..

Description of the Change:
Add vibronic Trotter time evolution template to labs.

Benefits:

Possible Drawbacks:

Related GitHub Issues:

[github-actions]

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Please edit doc/releases/changelog-dev.md with:

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.47%. Comparing base (5f2a71c) to head (ba13884).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9708   +/-   ##
=======================================
  Coverage   99.47%   99.47%           
=======================================
  Files         629      629           
  Lines       69155    69163    +8     
=======================================
+ Hits        68789    68797    +8     
  Misses        366      366           

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