Add experimental quicksort example

[kolt-mcb]

Summary

• introduce quicksort.fra as a new fraglets sorting demo
• document quicksort usage in README
• mention quicksort in INSTRUCTION_SET
• clean up trailing text in sort.fra

Testing

• pip install .
• pytest -q

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https://chatgpt.com/codex/tasks/task_e_687345cdf5fc83248d6a772a56f056e2

[Copilot]

Pull Request Overview

Introduces a new experimental quicksort example in the Fraglets demo, updates documentation to include usage instructions, and removes a stray line from the existing selection sort file.

• Add quicksort.fra with a recursive quicksort fraglet implementation
• Document quicksort in README.md and docs/INSTRUCTION_SET.md
• Clean up leftover demo line in sort.fra

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
sort.fra	Removed trailing commented demo fragment
quicksort.fra	New file: experimental quicksort implementation
docs/INSTRUCTION_SET.md	Added “Experimental QuickSort” section
README.md	Added quicksort usage example and instructions

Comments suppressed due to low confidence (3)

quicksort.fra:25

• [nitpick] State labels mix a qs_ prefix (e.g. qs_part) with unprefixed names like less_sort and greater_sort. Consider adding a consistent qs_ prefix to these labels (e.g. qs_less_sort) to avoid collisions and improve readability.

[matchp less_sort match less qsort]

quicksort.fra:32

• The new quicksort example isn’t covered by any automated test. Adding a pytest case that runs quicksort.fra with known inputs and verifies the sorted output would help catch future regressions.

[qsort 5 1 4 2 3]

docs/INSTRUCTION_SET.md:91

• [nitpick] The quicksort section describes the approach but doesn’t include a usage snippet. Consider adding a short fraglet invocation (e.g. [qsort 3 1 2]) and expected result to illustrate how to run the example directly in this document.

## Experimental QuickSort