feat: implement display for Transaction

[ItoroD]

Description

I think we need to be able to see the details of a Transaction when printed. In Kotlin, Transaction currently prints the memory address and not the display. @reez and I had noticed this and discussed briefly, see here . I think we have manual implementations of display for struct like Address, so why not add it to Transaction too. Its a bit of a hassle, developing and testing and not being able to see the printout for Tx. I understand that swift is ok having just debug trait and can printout with no issues. This will at least for now allow JVM users see the actual printouts.

Notes to the reviewers

Changelog notice

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I ran cargo fmt and cargo clippy before committing

New Features:

• I've added tests for the new feature
• I've added docs for the new feature

Bugfixes:

• This pull request breaks the existing API
• I've added tests to reproduce the issue which are now passing
• I'm linking the issue being fixed by this PR

[rustaceanrob]

I'm not sure it makes sense to derive the display trait for a debug string. The output won't be end-user friendly, so maybe this could be a "debug_string" method?

[ItoroD]

I'm not sure it makes sense to derive the display trait for a debug string. The output won't be end-user friendly, so maybe this could be a "debug_string" method?

Yes, I figured. Thanks for confirming. But without display implementation we can't view or print Transaction in Kotlin and this way is probably not the best way to go about it.

Not sure how debug_string will help. Maybe in display implementation instead of forwarding the debug output, we can print a more user friendly transaction string. 😓 starting to sound "hacky"

[reez]

ACK 2b5a771