Separator: init support of JSON config

src/modules/separator/option.h

@@ -0,0 +1,12 @@
+#pragma once
+
+// This file will be included in "fastfetch.h", do NOT put unnecessary things here
+
+#include "common/option.h"
+
+typedef struct FFSeparatorOptions
+{
+    const char* moduleName;
+
+    FFstrbuf string;
+} FFSeparatorOptions;