Remove Bitcoin Cash from SegWit script type support matrix

[coderabbitai]

Context

Bitcoin Cash does not support SegWit (neither P2SH-P2WPKH nor native SegWit). However, the btcSupportsScriptType method in packages/hdwallet-gridplus/src/gridplus.ts (lines ~87-98) incorrectly includes "BitcoinCash" in the arrays for:

• core.BTCInputScriptType.SpendP2SHWitness
• core.BTCInputScriptType.SpendWitness

Required Change

Remove "BitcoinCash" from both SegWit script type cases, leaving it only in the SpendAddress (legacy P2PKH) case.

References

• PR: feat: hdwallet-gridplus #731
• Comment: feat: hdwallet-gridplus #731 (comment)
• Requested by: @gomesalexandre