Add environment activation instructions to AGENTS.md

[drbenvincent]

---

📚 Documentation preview 📚: https://causalpy--582.org.readthedocs.build/en/582/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.43%. Comparing base (a388bc7) to head (e1a29fa).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #582   +/-   ##
=======================================
  Coverage   96.43%   96.43%           
=======================================
  Files          35       35           
  Lines        5446     5446           
=======================================
  Hits         5252     5252           
  Misses        194      194           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[juanitorduz]

I use micromamba XD as conda is siper slow ... and maybe others develop with pixi ... 🤔

[drbenvincent]

That is a good point. I wonder if there's a way to give instructions which can work out what a particular developer is doing. One solution would be a local file which has that info, but that's a bit of a burden on the developer and might start to put barriers up for new contributors. Maybe we could give it a list of options to try? Open to ideas.

[drbenvincent]

@copilot any thoughts?

[Copilot]

@drbenvincent I've opened a new pull request, #583, to work on those changes. Once the pull request is ready, I'll request review from you.