ANSI to Spectre.Console ANSI Text converter

[volundmush]

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No current problem, but a thing I'd really like.

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Rich has a utility function that can take text which has already been rendered as ANSI and convert it into a Text object.
I haven't found an equivalent to it in Spectre.Console and a MUD project I'm thinking of porting from Python depends on it.

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Well, I mean, I could write my own, but this seems like a thing that ought to be in Spectre.Console.

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