docs: add Windows / WSL note to README install section

[mvanhorn]

Summary

Closes #10.

Adds a short ### Windows subsection to the README's ## Install section. It documents the mitigation the maintainer flagged in the issue thread: npx promexeus setup works in any terminal and avoids the WSL/Windows path mismatch entirely. For users on the legacy setup.sh flow, a one-paragraph warning explains the "module not found" error and tells them to keep install/build/CLI inside one environment.

This addresses the first checkbox in #10. The other two checkboxes (native Windows setup path, native Windows CLI testing) require Windows infrastructure and are out of scope for a docs PR.

Files changed

• README.md — adds an 8-line ### Windows subsection between the global-install block and ## Drift Detection. Existing prose and code blocks are unchanged.

Test plan

• No code changes
• Existing install commands and headings unchanged
• New section follows the README's existing tone (informal, direct)
• Link to Windows: module not found error when running CLI after WSL setup #10 for context

[advancedresearcharray]

Rebased this branch onto current main and fixed stale package names so it should merge cleanly now.

What changed

• Rebased onto upstream main (was 17 commits behind, diverged)
• Resolved README conflict: ### Windows now sits after the Quick Start global-install block and before ## How It Works
• Updated outdated promexeus references to mex-agent to match the current README

Ready branch: advancedresearcharray:osc/10-windows-readme-callout (pushed to https://github.com/advancedresearcharray/mex/tree/osc/10-windows-readme-callout)

Fork update PR: mvanhorn#1 — merging that into this branch updates the head here. CI was already green before the rebase; a fresh run should pass after the branch updates.

[advancedresearcharray]

Opened a merge-ready carry-forward at #65 (rebased onto current main, mex-agent naming fixed). Maintainer can merge #65 and close this PR.

[advancedresearcharray]

Superseded by #65, which rebases this change onto current main and updates promexeus references to mex-agent. CI is green on #65 — happy to close this one once #65 merges.

[advancedresearcharray]

Merge status update: this PR's head branch is still the April 28 commit (964fdcd) and GitHub reports merge conflicts with current main (outdated promexeus naming + README layout changes).

A rebased, conflict-free version is ready:

• Branch: advancedresearcharray:osc/10-windows-readme-callout (rebased onto current main, mex-agent naming fixed)
• Carry-forward PR: docs: add Windows / WSL note to README install section (#10) #65 — CI green, mergeable

To refresh this PR's head (@mvanhorn), fast-forward the branch:

git fetch https://github.com/advancedresearcharray/mex.git osc/10-windows-readme-callout
git checkout osc/10-windows-readme-callout
git reset --hard FETCH_HEAD
git push --force-with-lease

Alternatively, the maintainer can merge #65 and close this PR — same README change, already rebased.

[advancedresearcharray]

Superseded by #65 — same change, rebased onto current main with promexeus → mex-agent naming updates. CI green and mergeable there.

[advancedresearcharray]

Heads up: #65 carries this forward rebased on current main (with mex-agent naming updates). CI is green there — happy to have #38 closed once #65 merges.

[mvanhorn]

Sounds good. #65 carries this forward with the original commit intact, so I'm happy for that one to land instead. I'll close #38 once #65 merges.

[theDakshJaitly]

Thanks @mvanhorn, and sorry for the slow turnaround on this one. Closing in favor of #65, which carries your change forward: rebased onto current main, the README section re-anchored where it moved to, and the package references updated (promexeus was renamed to mex-agent since you opened this). #65 credits you and supersedes this. Appreciate the original fix for #10.

[advancedresearcharray]

Thanks @theDakshJaitly — closing in favor of #65 makes sense. That PR carries @mvanhorn's original commit forward on current main with the mex-agent naming updates and the blockquote callout from #10. CI is green there whenever you're ready to merge.