Support of `ExtensionOptions` in `SigningStargateCilent` signing

[whalelephant]

Currently the sign function does not have argument for ExtensionOptions data and therefore users requiring such field to be non null must write their own functions such as SendTokens etc.

It would be good to have an optional field to propagate ExtensionOptions for transactions.

[ANSHTYAGI7]

can you please assign this issue to me

[ANSHTYAGI7]

import { ExtensionOptions } from 'The liabrary of extensions'

public async sign(
signerAddress: string,
messages: readonly EncodeObject[],
fee: StdFee,
memo: string,
explicitSignerData?: SignerData,
timeoutHeight?: bigint,
extensionOptions?: ExtensionOptions, // Add an optional parameter for ExtensionOptions
): Promise {
let signerData: SignerData;
if (explicitSignerData) {
signerData = explicitSignerData;
} else {
const { accountNumber, sequence } = await this.getSequence(signerAddress);
const chainId = await this.getChainId();
signerData = {
accountNumber: accountNumber,
sequence: sequence,
chainId: chainId,
};
}

return isOfflineDirectSigner(this.signer)
    ? this.signDirect(signerAddress, messages, fee, memo, signerData, timeoutHeight, extensionOptions)
    : this.signAmino(signerAddress, messages, fee, memo, signerData, timeoutHeight, extensionOptions);

}

[ANSHTYAGI7]

you can tell me enhancements to do Thank you