RemainingStringAttribute to allow raw remaining string to be matched.

[decaprime]

Add an attribute that would enable capturing the remaining string as a single string value as the last parameter in a command signature.

Consider if you wanted to make a command that echos the message to discord, in use it could look like:
.discord #general Hey folks
.discord #admins Can someone keep an eye on this player, they had some situation earlier and blah blah blah...

The command could look like:

[Command("discord")]
void Command(ICommandContext ctx, string channel, [Remainder]string remainder)
{
..
}