feat: add Clone and Copy

[darioAnongba]

Description

Add cloning capability to types. Add Copy to those that support it. Pass Transaction by reference where expected.

Notes to the reviewers

Mimic as much as possible the capabilities of the underlying types.

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