Added Avian AVN coin support (altcoin based on Bitcoin code)

[Refloow]

No description provided.

[Refloow]

Can we know if there are any additional edits needed, or do we need to provide any more data for Avian to be integrated?
Integration followed the rules & guidelines in documentation for adding altcoins based on bitcoin code.
A publication post about this pull request was made from official Avian Network twitter account: https://x.com/avianfoundation/status/1805278579162268048
Electrum would be used for wallet connectivity. Everything has been integrated, tested & finished on our end:
https://github.com/AvianNetwork/electrum-avian/releases
Looking forward to hearing from you soon, thanks in advance

[Hannsek]

Hi, sorry for the delayed message. We'll merge this soon if there are no troubles.

Please also add Trezor HW as a supported wallet to here if possible.

[matejcik]

@Refloow you will want to use ./common/tools/support.py to add support info for all models (that is currently T1B1, T2T1, T2B1, T3T1, T3B1). support.py --help or the readme in common/tools explains the process.

please also make sure make gen and make style run and the results are checked into this PR.

please rebase on top of current main so that we can get the CI results

[matejcik]

(marking "changes requested" per the above comment)