feat: Integrate ZKSync Wallet for ChainTechnicalStack-Specific Transaction Signing

[mshojaei-txfusion]

Description

This PR integrates the zksync-ethers wallet implementation for the ZKSync signer strategy. Key changes include:

• Added zksync-ethers dependency (v5.10.0)
• Updated ZKSyncSignerStrategy to use ZKSyncWallet instead of standard ethers Wallet
• Removed outdated TODO comment about ZKSync signer implementation

Drive-by changes

None

Related issues

N/A

Backward compatibility

Yes

Testing

Manual testing

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.53%. Comparing base (6e496b0) to head (b58434e).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4914   +/-   ##
=======================================
  Coverage   77.53%   77.53%           
=======================================
  Files         103      103           
  Lines        2110     2110           
  Branches      190      190           
=======================================
  Hits         1636     1636           
  Misses        453      453           
  Partials       21       21           

Components	Coverage Δ
core	87.80% <ø> (ø)
hooks	79.39% <ø> (ø)
isms	83.68% <ø> (ø)
token	91.27% <ø> (ø)
middlewares	79.80% <ø> (ø)