Expose API to directly call HashStruct from EIP-712 and M+N dims

[peterbroadhurst]

• Allows use of the EIP-712 hashing algorithm for the data itself, without needing to also supply a domin.
• Allows querying M and N dimensions of parsed Elementary Types
• Fixes issue where we could have a Component array containing a nil entry on the case of extra parameters on input
• Allows Recover functions to determine the original payload of the transactions, as well as the recovered signature
• Allows raw signing key access, as well as secp256k1 curve-adapted access, to private key materials from keystorev3
• Ensures errors from serializing inputs are returned

[EnriqueL8]

LGTM

[codecov]

Codecov Report

Attention: Patch coverage is 96.87500% with 2 lines in your changes missing coverage. Please review.

Project coverage is 99.62%. Comparing base (eb070cf) to head (1e4fa5d).
Report is 8 commits behind head on main.

Files	Patch %	Lines
pkg/keystorev3/walletfile.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main      #68      +/-   ##
===========================================
- Coverage   100.00%   99.62%   -0.38%     
===========================================
  Files           38       39       +1     
  Lines         3317     3474     +157     
===========================================
+ Hits          3317     3461     +144     
- Misses           0       13      +13     

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