Support btc wallet entries

[OrestisAlpos]

Extend the ipc-cli wallet new to accept a new wallet type btc. This creates a secp256k1 key, similar to the evm wallet type, but it makes sure that the y coordinate of the key is even, as required by taproot on bitcoin.
The reason we need this is because bitcoin-backed subnets will use this wallet (the corresponding key pair) both in the subnet and on bitcoin.

The output of ipc-cli wallet list --wallet-type btc should be something like:

Address: 0xd9de7930810060e59156c213cb9abba81fde1dfd PubKey: 0402c44b5cb925062742b91f6af7b2b493ed4ea4adb753153010a2a8584980c0ce6dd5a13792d307787738744bd4ed961256660e114b7f94dce8f96beedf171a20 XOnlyPubKey: 02c44b5cb925062742b91f6af7b2b493ed4ea4adb753153010a2a8584980c0ce
Address: 0x79ab3440cfd29ad25c91557d68716a816ed8048f PubKey: 0403dbb2178b38d53d85cbcd5689bc834899eb85173c1eddd213c0c77e68a17f81bd2931b5ca6056e46132711c43eb0eeb8af72fbf943a888f4c2c3b663465b1e2 XOnlyPubKey: 03dbb2178b38d53d85cbcd5689bc834899eb85173c1eddd213c0c77e68a17f81
Address: 0x7e89195f9ce9a31aff3383e2e055747c793810e5 PubKey: 041df495ba7e5ae8bf7e9964a8587e4a39cd2e92fe3390de8e650b25afbacc729ce020e32a14741c380b12dc4b5fc144a660c710102b7ee2787fc1bc047a797d60 XOnlyPubKey: 1df495ba7e5ae8bf7e9964a8587e4a39cd2e92fe3390de8e650b25afbacc729c
Address: 0x23df81f399387e8972b5286489378f139088ea85 PubKey: 042b73a0b2ec73ac050b2cae17d7b3ffa683518f1d7fe03b6a8580a46fbdc3841621224f9bfb70402a73bdf324007b32026d9d6ab12ee55c95964196028e8eaea4 XOnlyPubKey: 2b73a0b2ec73ac050b2cae17d7b3ffa683518f1d7fe03b6a8580a46fbdc38416

That's similar to what ipc-cli wallet list --wallet-type fevm returns, but with additionally returning the XOnlyPublicKey format of the public key.

[OrestisAlpos]

Handled in PR #11 , but #16 is still to be done.