feat(copier): get copyright year using jinja2-time

[34j]

Description of change

Pull-Request Checklist

• Code is up-to-date with the main branch
• This pull request follows the contributing guidelines.
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits follow conventions outlined in the conventional commit spec, such as "fix(api): prevent racing of requests".

• If pre-commit.ci is failing, try pre-commit run -a for further information.
• If CI / test is failing, try uv run pytest for further information.

[browniebroke]

That means we need to update the documentation (README instructions) to explain these new dependencies