split error and exception

src/commonMain/kotlin/com/infendro/cli/exception/DuplicateOption.kt

@@ -0,0 +1,10 @@
+package com.infendro.cli.exception
+
+import com.infendro.cli.option.Option
+
+class DuplicateOption(
+    val option: Option<*>,
+) : BuildException() {
+    override val message: String
+        get() = """duplicate option "${option.name}""""
+}