Support for Crosschain ANT Transactions

[defikintaro]

Hello team !

In the repository avalanchejs there is ANT export and import functionalities for both evm and avm. When I look into the source code here

avalanche-wallet/src/js/TxHelper.ts

Line 241 in ae64a5f

return await avm.buildExportTx(

and here:

avalanche-wallet/src/js/TxHelper.ts

Line 284 in ae64a5f

return await cChain.buildExportTx(

there is an export function for only Avax. Similar for the avalanche-wallet-sdk.

I believe exporting/importing ANT is required feature for the avalanche wallet. It's going to be necessary for the dapp developers who wants to make use of both evm and avm functionalities in their applications.

Thanks