Proper Windows support!

0.9.6

• Windows is now supported properly. Opening a preview in a Qt checkout
  with Windows (CRLF) line endings used to freeze VS Code on "Activating
  Extensions"; the .qdocconf parser now handles them. Configuration
  matching, excludefiles/excludedirs, and wildcard patterns also behave
  correctly with Windows paths and drive letters.
• If rendering a preview fails, the panel now shows the error instead of
  staying blank.
• A recursive macro or a \include that includes itself is reported as a
  problem instead of freezing the preview.
• Faster repeated \snippet and \include lookups on large trees.
• The extension's Marketplace page now shows the README screenshots.