Publish QuotedString recognizer in C# SDK

[chrimc62]

Quoted strings are a nice way to allow the user to be explicit about the boundaries of open-ended entities. Tom has a private quoted string recognizer published here: https://github.com/tomlm/iciclecreek.bot/tree/master/source/Libraries/Iciclecreek.Bot.Builder.Dialogs.Recognizers We should pull out the recognizer and add it to the SDK recognizers.