chore: update the benchmark scripts and documentation

[ludmilaasb]

By opening this PR I confirm that I have read CONTRIBUTING.md and I agree to the terms of the Contributor License Agreement.

Summary

This PR updates the 3rd party benchmark scripts. The SPECS are the same, the number of quibits is increased for Pauli Propagation and the scripts for comparing with MajoranaPropagation.jl were improved and simplified.

Changes

• Benchmarks page updated
• Majorana scripted comparison refactored
• Activated multi-threading for PauliPropagation.jl

Checklist

• Tests added or updated to cover the changes
• Documentation updated (docstrings, docs/, CONTRIBUTING.md) if needed
• CHANGELOG / release notes updated if applicable

AI/LLM disclosure

• I did not use LLM tooling, or used it only privately for ideation
• I used the following tool to help write this PR description:
• I used the following tool to generate or modify code: Claude Code Sonnet 5