Replace selection with a pair if delsel is on and autowrap is off

[Fuco1]

Discussed in #1163

^{Originally posted by Patrick-Poitras May 21, 2023}
Hello.

I'd like for the behavior of inserting a pair with a highlighted region to be replacing the region with the pair.

That is, if I have this is a |thing with thing highlighted, I'd like the insertion of "(" to result in this is a (). Currently it gives this is a (thing) when sp-autowrap-region is t, and this is a ()thing when it is nil.

Delete-selection-mode is t.