add identify command to wallet

[raphjaph]

No description provided.

[casey]

Need test coverage for a few cases:

• identify shows zero ordinals
• identify shows one ordinal
• identify shows two ordinal
• identify shows non-zero ordinal offset (to test offset handling)
• identify doesn't show anything from output with only common ordinals

One integration tests to test command, the rest unit tests with a wrapper like this:

fn identify(utxo: Vec<Utxo>) -> Vec<(Ordinal, OutPoint, u64, Rarity> {
}
```

[casey]

Nice, looks good! Only change would be to add an additional test which passes a two different UTXOs with two different outpoints, each with an uncommon ordinal, and makes sure that the right ordinal is associated with the right outpoint.

[casey]

Nice, LGTM!