refactor: seperate files, function and structs into seperate packages

internal/shell/shell.go

@@ -0,0 +1,23 @@
+package shell
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+var (
+	ExecCommand  = exec.Command
+	ExecLookPath = exec.LookPath
+)
+
+func ExecuteShellCommand(command string, env string) error {
+	cmd := ExecCommand("bash", "-c", command)
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, env)
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("befehl fehlgeschlagen: %v\nAusgabe: %s", err, output)
+	}
+	return nil
+}