Annotated tzinfo offset example

[jaymbans]

Change Summary

Added annotated tzinfo example pattern with offset building upon commit #9468

Related issue number

Related to offset discussion issue 8088

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[codspeed-hq]

CodSpeed Performance Report

Merging #9531 will not alter performance

_{Comparing jaymbans:tzinfo_offset_example (faba512) with main (e67524c)}

Summary

✅ 13 untouched benchmarks

[jaymbans]

Hey @sydney-runkle , this is my PR following our tzinfo conversation with @ChrisPappalardo at PyCon2024. It factors in the offset example from issue #8088

[sydney-runkle]

This is great! So excited to see annotated metadata being used in this way! Thanks for your contribution 🚀 !