feat: state root

[enitrat]

Closes #421

[codecov]

Codecov Report

Attention: Patch coverage is 98.11321% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.79%. Comparing base (42344a4) to head (2aabe27).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cairo/ethereum/cancun/trie.cairo	95.23%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #766      +/-   ##
==========================================
+ Coverage   80.78%   80.79%   +0.01%     
==========================================
  Files          56       56              
  Lines       12782    12828      +46     
==========================================
+ Hits        10326    10365      +39     
- Misses       2456     2463       +7     

Flag	Coverage Δ
ci	80.79% <98.11%> (?)

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