[codex] Add Windows Claude launcher

[jackdu125-glitch]

Summary

Adds a Windows-friendly launcher for using this repository as a Claude Code project template.

• Adds a double-clickable .bat entry point that calls the PowerShell launcher without bypassing execution policy.
• Adds a PowerShell launcher that checks required tools, prints versions, validates Claude login status, and starts Claude Code.
• Adds guarded parsing for claude auth status so malformed or missing JSON produces a clear error.
• Adds a small launcher test script covering logged-in, logged-out, and malformed auth-status responses.
• Adds a short RUN-ME-FIRST.md for Windows users.

Security / Risk Notes

The launcher avoids -ExecutionPolicy Bypass and does not collect or write credentials. It only invokes claude auth login when Claude Code reports the user is not logged in.

Validation

• powershell.exe -NoProfile -File test-launcher.ps1
• powershell.exe -NoProfile -File launch-claude-game-studio.ps1 -DryRun