Refactor + Bugs fixes on Strings + Gestion de la génération des images

Sources/CLIToolCore/Shell.swift

@@ -28,4 +28,24 @@ public class Shell {
         
         return (terminationStatus: task.terminationStatus, output: output)
     }
+    
+    @discardableResult
+    public static func shell(_ args: [String]) -> (terminationStatus: Int32, output: String?) {
+        let task = Process()
+        task.launchPath = "/usr/bin/env"
+        task.arguments = args
+        
+        let pipe = Pipe()
+        task.standardOutput = pipe
+        task.launch()
+        task.waitUntilExit()
+        
+        let data = pipe.fileHandleForReading.readDataToEndOfFile()
+        
+        guard let output: String = String(data: data, encoding: .utf8) else {
+            return (terminationStatus: task.terminationStatus, output: nil)
+        }
+        
+        return (terminationStatus: task.terminationStatus, output: output)
+    }
 }