[SC-1426] Permit2 for zksync

[zZoMROT]

Added helper method getPermit2Address to avoid breaking changes by selecting the appropriate constant based on chainId for zkSync and other networks.

Static Code Analysis (readability, compactness):

Improves flexibility without modifying existing logic.

Dynamic Code Analysis (external APIs, interaction flows):

Ensures correct Permit2 contract address selection per supported network.

Efficiency (gas costs, computational complexity, memory requirements):

Minimal gas overhead with conditional logic.

Opinion, trade-offs and other thoughts (optional):

• Maintains backward compatibility while adding multi-chain support.
• Easy to add different custom networks in the future.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (0268e85) to head (887dc33).
Report is 13 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #174   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           17        17           
  Lines          342       346    +4     
  Branches        65        65           
=========================================
+ Hits           342       346    +4     

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