Add executable config

Author: brenoafb

Package.swift

@@ -7,7 +7,7 @@ let package = Package(
   name: "SwiftLisp",
 
   products: [
-    // .executable(name: "slisp", targets: ["slisp"]),
+    .executable(name: "slisp", targets: ["slisp"]),
     .library(name: "SwiftLisp", targets: ["SwiftLisp"])
   ],
 
@@ -18,9 +18,9 @@ let package = Package(
   targets: [
     // Targets are the basic building blocks of a package. A target can define a module or a test suite.
     // Targets can depend on other targets in this package, and on products in packages this package depends on.
-//    .target(
-//      name: "slisp",
-//      dependencies: ["SwiftLisp"]),
+    .target(
+      name: "slisp",
+      dependencies: ["SwiftLisp"]),
     .target(
       name: "SwiftLisp",
       dependencies: [],