Add stub for doll-master and doll services, add required vendored libs

vendor/github.com/carlmjohnson/requests/internal/minitrue/minitrue.go

@@ -0,0 +1,9 @@
+// Package minitrue - Whatever the Package holds to be the truth, is truth.
+package minitrue
+
+func Cond[T any](val bool, a, b T) T {
+	if val {
+		return a
+	}
+	return b
+}