Remove main.cpp and change c++ target to not be executable

CHANGELOG.md

@@ -1,3 +1,7 @@
+# ChessKitEngine 0.1.1
+Released Friday, April 14, 2023.
+
+* Fix build issue related to missing ChessKitEngine_Cxx target
         
 # ChessKitEngine 0.1.0
 Released Friday, April 14, 2023.

Package.swift

@@ -13,7 +13,7 @@ let package = Package(
     products: [
         .library(
             name: "ChessKitEngine",
-            targets: ["ChessKitEngine"]
+            targets: ["ChessKitEngine", "ChessKitEngine_ObjC", "ChessKitEngine_Cxx"]
         )
     ],
     targets: [
@@ -25,7 +25,7 @@ let package = Package(
             name: "ChessKitEngine_ObjC",
             dependencies: ["ChessKitEngine_Cxx"]
         ),
-        .executableTarget(name: "ChessKitEngine_Cxx"),
+        .target(name: "ChessKitEngine_Cxx"),
         .testTarget(
             name: "ChessKitEngineTests",
             dependencies: ["ChessKitEngine"]