Export hashed chain state

[bbist]

Description

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature/Enhancement (non-breaking change which adds functionality or enhances an existing one)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation update
• [ ] Refactor
• [ ] New or updated tests

Checklist

• [ ] I have performed a self-review of my code.
• [ ] I have commented my code where necessary.
• [ ] I have updated the documentation if needed.
• [ ] My changes do not introduce new warnings.
• [ ] I have added tests that prove my changes are effective or that my feature works.
• [ ] New and existing tests pass with my changes.

Related Issues

[storopoli]

Does this need to be backported to releases/0.1.0?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 56.64%. Comparing base (a6af246) to head (e5af88c). Report is 3 commits behind head on bitvm2.

@@            Coverage Diff             @@
##           bitvm2     #463      +/-   ##
==========================================
- Coverage   56.64%   56.64%   -0.01%     
==========================================
  Files         249      249              
  Lines       28064    28066       +2     
==========================================
  Hits        15897    15897              
- Misses      12167    12169       +2     

Files with missing lines	Coverage Δ
crates/state/src/chain_state.rs	94.44% <100.00%> (+0.21%)	:arrow_up:

... and 5 files with indirect coverage changes