Add docstring and typing to estimation

[Sichao25]

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[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (1e8ffe4) 22.54% compared to head (8d09107) 22.15%.
Report is 71 commits behind head on master.

Files	Patch %	Lines
dynamo/estimation/tsc/estimation_kinetic.py	98.95%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #611      +/-   ##
==========================================
- Coverage   22.54%   22.15%   -0.39%     
==========================================
  Files         166      166              
  Lines       27362    27988     +626     
==========================================
+ Hits         6168     6200      +32     
- Misses      21194    21788     +594     

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