[Feature Request] Add custom firmware update via GUI

[roypit]

Would be nice to allow users to upgrade the firmware of their hardware device, conveniently and directly through Sparrow UI.
I see that Trezor (who offers a bitcoin-only custom hardware) used to only allow this via command-line, but have now added a welcoming option to do so directly from Suite.
(screenshot: https://wiki.trezor.io/images/Install-prompt.png)
The user only has to download the firmware .bin file from github and the UI does the rest

[craigraw]

Sparrow relies on the HWI library to take care of USB hww communications. There is an existing PR (still not merged) for HWI to perform firmware updates - unfortunately it does not support Ledger, mainly because Ledger makes this very difficult to do. It does however appear to support Coldcard, Trezor and Bitbox. Downloading the firmware update is also supported.

Can I suggest commenting on and motivating for the PR? This is the best way to get this functionality into Sparrow.

bitcoin-core/HWI#300