* Add workspace.fontAliasing configuration option

Add simple boolean configuration option that controls how fonts are being rendered in workbench.

Enabling this option in configuration results with more native feel on macOS.

* Add different modes for workbench.fontAliasing

Support both additional "antialiased" and "none" methods on font antialiasing. Leaving subpixel-antialiased as default

See #2577

* Apply workbench.fontAliasing on document.body

Instead of using only workbench element, apply font aliasing setting globally on entire window.

See #2577

Support add folder to workspace only in multi root workspace

* fixes #17962

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