docs: clarify resetting VITE_SIM_VERSION to return to v0

[Radhikaa-chauhan]

Fixes #967

Describe the changes you have made in this PR -

This PR updates the README to clarify how to switch back to the default v0 simulator after running v1 by resetting or unsetting the VITE_SIM_VERSION environment variable.

Screenshots of the UI changes (If any) -

Not Applicable

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Code Understanding and AI Usage

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Explain your implementation approach:
This PR addresses a documentation gap where contributors may be unsure how to return to the default v0 simulator after running v1.
The approach was to add a brief note in the README explaining that VITE_SIM_VERSION persists and must be reset or unset.

An alternative was to assume prior knowledge of environment variables, but that can confuse new contributors.
This solution was chosen because it is minimal, clear, and improves contributor experience without changing any code.

Key change: a README update only.

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Summary by CodeRabbit

• Documentation
  • Clarified setup notes: after running v1, you must unset or reset the VITE_SIM_VERSION to v0 to return to the default simulator. Includes platform-specific commands for Windows and macOS/Linux to guide reverting the environment setting.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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Walkthrough

The README.md Start v1 section was updated to note that after setting VITE_SIM_VERSION to v1, the environment variable persists across sessions. It instructs contributors to either unset the variable or reset it to v0 to return to the default simulator version and includes example commands for Windows and Unix-based systems.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main documentation change: clarifying how to reset VITE_SIM_VERSION to return to v0.
Linked Issues check	✅ Passed	The PR fulfills issue #967 requirements by adding a note explaining that VITE_SIM_VERSION must be unset or reset to v0, with environment variable examples for both Windows and Unix systems.
Out of Scope Changes check	✅ Passed	All changes are strictly documentation-focused (README updates) and directly address the clarification requested in issue #967; no out-of-scope modifications detected.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@README.md`:
- Around line 41-49: Update the README "Start v1 (Windows/Unix)" section to
split the Windows instruction into separate CMD and PowerShell variants for
setting/unsetting the VITE_SIM_VERSION env var: keep the CMD form using the
traditional set syntax and add a PowerShell form using the PowerShell
environment-variable approach (session-scoped) for both setting and unsetting;
ensure the note refers to the exact env var name VITE_SIM_VERSION and update the
examples under the note to show the correct CMD and PowerShell commands
separately.