Refactor the dynamics

[Sichao25]

Refactor the dynamics to classes.

[codecov-commenter]

Codecov Report

Merging #549 (333740c) into master (583d2f1) will decrease coverage by 0.86%. The diff coverage is 4.47%.

:exclamation: Your organization needs to install the Codecov GitHub app to enable full functionality.

@@            Coverage Diff             @@
##           master     #549      +/-   ##
==========================================
- Coverage   22.69%   21.84%   -0.86%     
==========================================
  Files         160      161       +1     
  Lines       26551    28104    +1553     
==========================================
+ Hits         6026     6139     +113     
- Misses      20525    21965    +1440     

Files	Coverage Δ
dynamo/tools/__init__.py	100.00% <100.00%> (ø)
dynamo/tools/dynamics.py	12.60% <ø> (-3.89%)	:arrow_down:
dynamo/tools/moments.py	18.00% <45.45%> (+0.59%)	:arrow_up:
dynamo/tools/utils.py	32.25% <6.25%> (-0.69%)	:arrow_down:
dynamo/estimation/csc/velocity.py	14.90% <2.40%> (-6.87%)	:arrow_down:
dynamo/estimation/tsc/storm.py	4.71% <4.71%> (ø)

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more