add tapret DFS path or opret host in psbt bundle CLI command

[nicbus]

completing an RGB transfer using the CLI currently requires the user to prepare the PSBT to hold the committment (before psbt bundle for opret or afterwards for tapret), and there is no CLI command to do so (one either needs to use descriptor-wallet for walleting or write one in rust)

this PR attepmts to drop such requirement by adding the close method as an optional parameter (tapret as default, like for the blind command) and, if needed, automatically set tapret DFS path or opret host

this change should allow users to create PSBTs with their wallet software of choice and still be able to use the CLI to transfer RGB assets

PS: opening this on branch v0.8 instead of master as the .set_opret_host method is not available there (yet)

[dr-orlovsky]

Please see my comments: seems like the logic used is non-standard (i.e. it doesn't checks for the first output matching criteria)

[nicbus]

notes:

• new version also updates commit_verify and rgb-core dependencies
• once this PR is accepted, let's also port this to the master branch, once .set_opret_host will be available (I can open a new PR if you want me to)

[nicbus]

@dr-orlovsky could you please let me know if the changes are ok for you?

[dr-orlovsky]

Sorry for the late review - missed in GitHub notifications :(

[nicbus]

@dr-orlovsky requested changes applied (with a note), could you please have a look?

[dr-orlovsky]

ACK 7e16ff7