Choose the inline prediction color based on the environment

[daxian-dbw]

PR Summary

Fix #3805

Choose the inline prediction color based on the environment. On Windows OS prior to Win11, if it's not running in Windows Terminal, then we use the old inline color that was used in v2.2.6. Otherwise, we use the new color, which provide sufficient contrast in terminals that don't use a pure black background (like VSCode terminal). See #3493 for the color change.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure you've added one or more new tests
• Make sure you've tested these changes in terminals that PowerShell is commonly used in (i.e. conhost.exe, Windows Terminal, Visual Studio Code Integrated Terminal, etc.)
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed at PowerShell-Docs
    • Doc Issue filed:

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