* Add fallible methods to KeypairUtil * Add RemoteKeypair struct and impl KeypairUtil * Implement RemoteKeypair in keygen; also add parse_keypair_path for cleanup
* Initial remote wallet module * Add clap derivation tooling * Add remote-wallet path apis * Implement remote-wallet in solana-keygen * Implement remote-wallet in cli for read-only pubkey usage * Linux: Use udev backend; add udev rules tool * Ignore Ledger live test * Cli api adjustments