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/fuse.go

@@ -13,7 +13,7 @@ func (t Toolchain) newFuse() (pkg.Artifact, string) {
 		mustDecode(checksum),
 		pkg.TarGzip,
 	), nil, &MesonHelper{
-		Setup: [][2]string{
+		Setup: []KV{
 			{"Ddefault_library", "both"},
 			{"Dtests", "true"},
 			{"Duseroot", "false"},