feat: add Marshal and Unmarshal methods to SM(S)T proof types

[h5law]

Description

Summary generated by Reviewpad on 06 Sep 23 15:52 UTC

This pull request introduces changes to the codebase related to serialization and deserialization of SparseMerkleProof and SparseCompactMerkleProof. The Marshal and Unmarshal methods are added to both structures to convert them to bytes and vice versa. Additionally, some tests are added for these serialization methods to ensure their correctness.

Issue

Fixes N/A

Type of change

Please mark the relevant option(s):

• New feature, functionality or library
• Bug fix
• Code health or cleanup
• Major breaking change
• Documentation
• Other

List of changes

• Add Marshal and Unmarshal methods to both SM(S)T proof types
• Add unit tests

Testing

• Task specific tests or benchmarks: go test ...
• New tests or benchmarks: go test ...
• All tests: go test -v

Required Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added, or updated, godoc format comments on touched members (see: tip.golang.org/doc/comment)
• I have tested my changes using the available tooling

If Applicable Checklist

• Update any relevant README(s)
• Add or update any relevant or supporting mermaid diagrams
• I have added tests that prove my fix is effective or that my feature works

[codecov]

Codecov Report

Patch coverage: 76.00% and project coverage change: -0.20% ⚠️

Comparison is base (2876295) 84.89% compared to head (ba147fb) 84.69%.

Additional details and impacted files

@@             Coverage Diff             @@
##           kvstore      #21      +/-   ##
===========================================
- Coverage    84.89%   84.69%   -0.20%     
===========================================
  Files            8        8              
  Lines         1092     1117      +25     
===========================================
+ Hits           927      946      +19     
- Misses         122      126       +4     
- Partials        43       45       +2     

Files Changed	Coverage Δ
proofs.go	88.46% <76.00%> (-1.99%)	⬇️

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[red-0ne]

LGTM 👍

[Olshansk]

lgtm