feat: core-owned supported hardware-wallet catalog (#107 subtask 4)

[coreyphillips]

Summary

Subtask 4 of #107. Core now owns the catalog of supported hardware wallets, so iOS and Android render the supported-device list generically instead of each hardcoding Trezor metadata. Follow-up from the review note on synonymdev/bitkit-android#1039 ("this could come from Bitkit-core in the future, because it is where all supported HW info is actually located").

What changed

New UniFFI surface in the trezor module (re-exported from lib.rs):

pub enum HardwareWalletVendor { Trezor }   // extensible to other vendors

pub struct SupportedHardwareWallet {
    vendor: HardwareWalletVendor,
    vendor_name: String,        // "Trezor"
    model: String,              // "Safe 7"  (stable key for image mapping)
    display_name: String,       // "Trezor Safe 7"
    transports: Vec<TrezorTransportType>,
}

pub fn get_supported_hardware_wallets() -> Vec<SupportedHardwareWallet>;

Catalog (Trezor's full lineup):

display_name	transports
Trezor Model One	Usb
Trezor Model T	Usb
Trezor Safe 3	Usb
Trezor Safe 5	Usb
Trezor Safe 7	Usb, Bluetooth

Platform handling

Core stays platform-agnostic. Apps filter on transports:

• Android supports all models, renders the whole catalog.
• iOS is Bluetooth-only, so it shows only entries whose transports include Bluetooth (currently just the Safe 7).

Notes

• Fields are intentionally minimal. Runtime capabilities (passphrase entry, etc.) already come from TrezorFeatures on a connected device, so the catalog only needs identity + transports. Apps map model to their own bundled images.
• Version bumped to 0.3.5; all platform bindings + native artifacts regenerated via build.sh all, and the Package.swift checksum matches the rebuilt BitkitCore.xcframework.zip.

Tests

cargo test --lib supported_hardware_wallets — asserts the lineup, well-formed entries (USB on every model, display_name = "Trezor {model}"), and that the Bluetooth-capable filter yields exactly the Safe 7.

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