feat: Implement Chapter 4 (scanner)

[danvk]

PR Checklist

• Addresses an existing open issue: fixes #000
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

[github-actions]

PR Compliance Checks

Thank you for your Pull Request! We have run several checks on this pull request in order to make sure it's suitable for merging into this project. The results are listed in the following section.

Issue Reference

In order to be considered for merging, the pull request description must refer to a specific issue number. This is described in our Contributing Guide. We are closing this pull request for now but you can update the pull request description and reopen the pull request.
The check is looking for a phrase similar to: "Fixes #XYZ" or "Resolves #XYZ" where XYZ is the issue number that this PR is meant to address.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (main@14498fe). Click here to learn what that means.

❗ Current head 8ba6f58 differs from pull request most recent head 17f458c. Consider uploading reports for the commit 17f458c to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #3   +/-   ##
=======================================
  Coverage        ?   74.92%           
=======================================
  Files           ?        5           
  Lines           ?      331           
  Branches        ?       39           
=======================================
  Hits            ?      248           
  Misses          ?       82           
  Partials        ?        1           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.