Add type check for forcefield parameter in Simulation

[chrisjonesBSU]

This PR adds and error that is thrown if the forcefield parameter of Simulation is not a sequence of hoomd.md.force.Force objects.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.40%. Comparing base (e5d3de9) to head (84f57e6).
Report is 8 commits behind head on main.

❗ Current head 84f57e6 differs from pull request most recent head 5df13f7. Consider uploading reports for the commit 5df13f7 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #118      +/-   ##
==========================================
+ Coverage   94.38%   94.40%   +0.01%     
==========================================
  Files          25       25              
  Lines        1834     1840       +6     
==========================================
+ Hits         1731     1737       +6     
  Misses        103      103              

Files	Coverage Δ
flowermd/base/simulation.py	91.64% <100.00%> (+0.15%)	⬆️