feat(trezor): add account info, compose, and broadcast FFI exports

[coreyphillips]

This PR:

• Adds account_info module with BDK/Electrum queries (no device required)
• Adds compose module bridging bitkit-core account types to trezor-connect-rs offline coin selection
• Adds fetch_prev_txs to retrieve previous transactions needed for non-SegWit signing
• Adds broadcast_raw_tx to broadcast signed transactions via Electrum
• Adds AccountInfoError error type for blockchain query operations
• Adds reverse ScriptType conversion and compose FFI types
  (TrezorFeeLevel, TrezorSortingStrategy, TrezorPrecomposeOutput,
  TrezorPrecomposeParams, TrezorPrecomposedInput, TrezorPrecomposedOutput,
  TrezorPrecomposedResult)

New FFI exports

Function	Description
trezor_get_account_info	Queries account data from xpub via Electrum
trezor_get_address_info	Queries balance/UTXOs for a single address
trezor_account_type_to_script_type	Maps account type to script type
trezor_precompose_transaction	Performs offline coin selection and fee calculation
trezor_precomposed_to_sign_params	Converts compose results to signing parameters
trezor_fetch_prev_txs	Fetches previous transactions from Electrum
trezor_broadcast_raw_tx	Broadcasts signed transaction via Electrum

[coreyphillips]

Some of these methods in the trezor module could arguably be moved to the onchain module, but since it's only being used to wire up Trezor functionality I've decided to leave them here for now.

[ben-kaufman]

I think there's no good reason to have methods which would be useful for any hardware integration in the Trezor module when it can be already be in onchain or separate module, and the benefit will be important later on. Is there any notable complexity or barrier to moving it out of the Trezor module?

[coreyphillips]

I think there's no good reason to have methods which would be useful for any hardware integration in the Trezor module when it can be already be in onchain or separate module, and the benefit will be important later on. Is there any notable complexity or barrier to moving it out of the Trezor module?

@ben-kaufman several methods were moved from trezor to onchain as of this commit with an updated release here.