Doc ability to customize FileInfo colors

[SteveL-MSFT]

Summary of the new document or enhancement

• List of articles that need to be updated: https://github.com/MicrosoftDocs/PowerShell-Docs/blob/staging/reference/docs-conceptual/learn/experimental-features.md
• New articles that need to be created:
• Link(s) to related code PR(s) in the PowerShell/PowerShell repo: Add support to colorize FileInfo file names PowerShell/PowerShell#14403
• Link(s) to related issue(s) in the PowerShell/PowerShell repo:

Description of what changed

Built on PSAnsiRendering experimental feature to enable coloring of specific file types. Example:

Adds FileInfo member to $PSStyle automatic variable to allow customization. Directory, SymbolicLink, and Executable are built-in, but an Extension member which is a dictionary allows modification and addition of new extensions and custom styles. Leverages existing NameString extended member for coloring. Pre-included extensions for archives and PowerShell files. Default color choices are mostly consistent with ls --color.