[Edit] Git: log

[Big-Logic]

Description

Improved the clarity and structure of the current git log documentation and added new sections explaining how to navigate and use git log with different options. The doc lives in https://github.com/Codecademy/docs/tree/main/content/git/concepts/log/log.md.

Issue Solved

Closes #6636

Type of Change

• Updating the documentation

Checklist

• All writings are my own.
• My entry follows the Codecademy Docs style guide.
• My changes generate no new warnings.
• I have performed a self-review of my own writing and code.
• I have checked my entry and corrected any misspellings.
• I have made corresponding changes to the documentation if needed.
• I have confirmed my changes are not being pushed from my forked main branch.
• I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• I have linked any issues that are relevant to this PR in the Issues Solved section.

[CLAassistant]

All committers have signed the CLA.