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/pcre2.go

@@ -20,7 +20,7 @@ func (t Toolchain) newPCRE2() (pkg.Artifact, string) {
 ln -s ../system/bin/toybox /bin/echo
 `,
 	}, &MakeHelper{
-		Configure: [][2]string{
+		Configure: []KV{
 			{"enable-jit"},
 			{"enable-pcre2-8"},
 			{"enable-pcre2-16"},