Q1 Ledger App - New Functionality: API to get supported ledgers

[lmuntaner]

In #248, we introduce a new functionality where we might show some tokens as raw integers instead of a user-friendly token amount.

If a dapp is interacting with a non-supported ledger, it should probably tell the user to expect such a number instead of the token amount.

To accomplish this, we would like to add an API in the Ledger device to return the list of supported ledgers.

The API can return the same data structure as passed in #248 with a ledger canister id, token symbol and decimals count.

🔗 zboto Link

[lmuntaner]

Priority Q1 2025