Windows setup: clarify pip installation steps

[yashh152004]

This issue tracks a small Windows-only documentation update.

Scope:

• ENVIRONMENT_SETUP.md
• Windows Python / pip installation clarification

No changes to core, framework, or LLM code.

[yashh152004]

I’m happy to work on this.
Assignment may require maintainer permissions.

I’ve created issue #1087 to track this change.

I’m unable to assign myself since I’m not a collaborator.
Could a maintainer please assign me so I can reopen the PR?

The changes are Windows-only docs (ENVIRONMENT_SETUP.md).

[github-actions]

Found a possible duplicate of #676: Both issues track adding Windows Python/pip installation clarifications to ENVIRONMENT_SETUP.md. Issue #676 is more comprehensive and already has related discussion and labels. If you feel this is a different scope, please react with a thumbs-down and we can keep this open.