* Add explicit file name unicode mappings
* Added nerd file extensions
* Add folder icon
* Added tests and attribution
* Fix tree view not using System.IO.Abstractions
* Make FileDialog tree use IconGetter
* Added context to IconGetter
* Make Nerd a config setting
* Fix typo in attribution
* tidy up
* Change open folder check to null or whitespace
* Update class diagram to show new classes
* Rename configuration property NerdFonts and set it to ThemeScope
* Move NerdFonts setting to ConsoleDriver
* Move NerdFonts setting to NerdFonts class and rename Enable
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Co-authored-by: Tig <tig@users.noreply.github.com>
