feat: tweak windows sandbox strings

[ae-openai]

New strings:

1. Approval mode picker just says "Select Approval Mode"
2. Updated "Auto" to "Agent"
3. When you select "Agent", you get "Agent mode on Windows uses an experimental sandbox to limit network and filesystem access. [Learn more]"
4. Updated world-writable warning to "The Windows sandbox cannot protect writes to folders that are writable by Everyone. Consider removing write access for Everyone from the following folders: {folders}"

[chatgpt-codex-connector]

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