move bash quick reference to main materials directory, minor autograder tweaks

[dtxe]

The changes involve renaming and updating the bash reference document, as well as modifying the autograder script to improve clarity in the feedback provided.

Updates to bash reference document:

• Renamed 04_this_cohort/additional_resources/bash_commands_cheatsheet.md to 01_materials/bash_quick_reference.md and updated the title from "Bash Commands Cheatsheet" to "Bash Commands Reference".
• Simplified the description for the | nl command from "number the lines of the input" to "line numbering".

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[Copilot]

Pull Request Overview

This pull request moves the Bash quick reference into the main materials directory while applying minor tweaks to the autograder's question labeling.

• Updated the autograder question strings for consistency.
• Revised the header and bullet descriptions in the Bash quick reference for improved clarity.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
03_instructional_team/autograder/autograder.py	Updated question identifiers to standardize the autograder output text.
01_materials/bash_quick_reference.md	Adjusted the title and minor bullet text for clarity.

Comments suppressed due to low confidence (3)

03_instructional_team/autograder/autograder.py:121

• [nitpick] Consider standardizing the question naming format across all autograder parts; if you include a question identifier in Part 1, a similar approach could be applied to other parts for consistency.

s.append({'question': f'Part 1 - Q{qn:d}', 'status': 0, 'comment': '`ls` command not run'})

03_instructional_team/autograder/autograder.py:277

• [nitpick] Removing the explicit question number 'Q1' from Part 2 may reduce clarity if there are multiple questions; consider including a question identifier to match the format used in Part 1.

s.append({'question': 'Part 2', 'status': 1})

03_instructional_team/autograder/autograder.py:290

• [nitpick] For consistency, consider appending a question identifier (e.g., 'Q1') similar to the approach in Part 1, which may help clarify the output when multiple questions are involved.

'question': 'Part 2',