docs:fix typo in docs for the directory in environment steup

[saurabh007007]

Description

It fixes the typo in the docs for setting up the environment

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)

Testing

Describe the tests you ran to verify your changes:

• Unit tests pass (cd core && pytest tests/)
• Lint passes (cd core && ruff check .)
• Manual testing performed

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[Copilot]

Pull request overview

Updates environment-setup.md to correct documentation typos/formatting in the environment setup guide, improving readability and accuracy for developers onboarding to the project.

Changes:

• Reformatted the “CLI Command Reference” into a properly aligned Markdown table.
• Fixed a typo in the Opencode quickstart instruction (“directorys” → “directory”).
• Added spacing around sections/code blocks to improve Markdown rendering.

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[saurabh007007]

@bryanadenhq Could you review this it is reday to merge