Bitbox-API simulator feature flga

[sdmg15]

Hello,
Thanks for this library.
I'm currently working on this PR from BDK bitcoindevkit/bdk_wallet#206 and I was exactly about to open an issue to request for bitbox-api bumping thankfully you did it before.

But I have another request, bitbox-api offers simulator feature, and it could be useful for people doing tests outside of physical devices. I'm using also using that feature in my PR. If you could enable it also on async-hwi so that people that depend on it can enable/disable it at will like other features it'll great.
Thanks.

Originally posted by @sdmg15 in #112 (comment)

[pythcoiner]

Hi, indeed it can be usefull, do you mind opening a PR?

[sdmg15]

Hello @pythcoiner The PR is opened already please can you review it?
Thanks.

[pythcoiner]

will try to take a look net week, thanks!

[sdmg15]

Hello @pythcoiner I'm just catching up with this issue,
Please when you can take a look so that on BDK end we can merge and input the changes on the next release.
THanks

[pythcoiner]

sorry my week have been long 😄

[sdmg15]

Hehe alright thanks for reviewing.
Hopefully it can be merged soon.

[pythcoiner]

ping @edouardparis