internal/rosa: key-value type

This type is used very frequently. The new type is much easier to type and can receive helper methods eventually if needed.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/ncurses.go

@@ -15,7 +15,7 @@ func (t Toolchain) newNcurses() (pkg.Artifact, string) {
 		// "tests" are actual demo programs, not a test suite.
 		SkipCheck: true,
 
-		Configure: [][2]string{
+		Configure: []KV{
 			{"with-pkg-config"},
 			{"enable-pc-files"},
 		},