Working on parser refactor

v0/str.h

@@ -14,4 +14,14 @@ typedef struct {
     size_t length;
 } String;
 
+/**
+ * Creates a copy of a string.
+ * 
+ * Note that this copy has to be freed afterwards.
+ * 
+ * @param string The string to copy.
+ * @returns A null-terminated copy of the string.
+ */
+char* string_copy(String string);
+
 #endif