Enhancement: Drop quotes around strings

[lorenzhs]

It would be nice if sqlplot-tools dropped quotes around strings, e.g. in

RESULT comment="foo" time=123.45

I'm not sure if this is something the database should do or whether it should be sqlplot-tools' job, but the current situation can be rather frustrating.

[bingmann]

Well, yes, we would probably want to perform quote-parsing.
But then real parsing with escape sequences like \" \\ \n, etc.