feat: enable intent handling for all EVM chains with TSS support

[venkateshv1266]

Summary

• Replaced hardcoded EVM chain list with dynamic check using baseCoin.isEVM() && baseCoin.supportsTss()
• Enables intent handling for all EVM chains that support TSS/MPC automatically
• Improves maintainability by removing need to update hardcoded chain lists for new EVM chains

Test plan

• Verify existing EVM chains (eth, polygon, bsc, coredao, seievm) continue to work
• Test that new EVM chains with TSS support are automatically enabled
• Ensure non-EVM chains or EVM chains without TSS are not affected

CLOSES TICKET: COIN-7464

[venkateshv1266]

We have existing tests for previously hardcoded chains. Hence no need to add new one.