Rewrite MC-01a and MC-01b tutorials

[egull]

Summary

MC-01a (Autocorrelations)

• Fix code block languages: ALPS parameter files and shell commands were incorrectly tagged as Python; only actual Python code now uses that tag
• Fix task file count: said task1 through task5 but there are 6 system sizes
• Remove outdated Internet Explorer reference
• Expand the Cluster updates section with full runnable code and a physical explanation of critical slowing down ($\tau \sim L^z$)
• Add an intro paragraph explaining autocorrelation time and the binning analysis

MC-01b (Equilibration)

• Remove broken "Read here to see how it works." placeholder
• Rewrite awkward "The headers:" code fragments into proper prose-plus-code sections
• Expand the convergence section to explain what checkConvergence does and when to act on its output
• Add a Questions section

Test plan

• Code blocks render with correct syntax highlighting (plain for parameters/shell, Python for scripts)
• All download links for parm1a, parm1b, tutorial1a.py, tutorial1b.py resolve
• Figures mcs01binlocal.png and mcs01bincluster.png render correctly
• Prose is physically accurate (critical slowing down, binning analysis, steady-state check)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR rewrites the English MC-01a (autocorrelations) and MC-01b (equilibration) tutorial pages to fix formatting issues, correct factual errors, and expand the physical explanations.

Changes:

• Correct code-fence languages (parameter/shell blocks are no longer tagged as Python), fix the task-count text (six tasks for L = 2…48), and drop outdated browser-specific commands.
• Expand the MC-01a Cluster updates section with full runnable command-line and Python snippets and a physical explanation of critical slowing down ($\tau \sim L^z$).
• Rewrite MC-01b with a clearer equilibration intro, prose-driven checkSteadyState/checkConvergence walkthroughs, and a new Questions section.

Reviewed changes

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

File	Description
content/en/tutorials/mcs/mc01a.md	Reworks intro, fixes code-fence languages and task counts, drops IE/browser instructions, and expands the cluster-update section with full code and critical-slowing-down explanation.
content/en/tutorials/mcs/mc01b.md	Adds equilibration/burn-in intro, consolidates the Python setup block, expands checkSteadyState/checkConvergence discussion, and adds a Questions section.

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[Ooolab]

Could @egull resolve the conflicts? I was confused with "current change" and "incoming change". Did you change the file twice?

[egull]

Closing due to merge conflicts — mc01a.md and mc01b.md were already updated via PRs #47 and #48. Will redo the improvements on top of current main.