Add "string" command

src/execute.c

@@ -186,6 +186,16 @@ void execute(Stack *stack, Stack *originstack, char *modname)
             continue;
         }
 
+	if (!strcmp(NAME, "string"))
+	{
+		for (char *i = ARG; *i != '\0'; i++)
+			stack_push(stack, *i);
+
+		stack_push(stack, strlen(ARG));
+
+		continue;
+	}
+
         // Math
 
         if (!strcmp(NAME, "add"))

tests/string_push.lb

@@ -0,0 +1,3 @@
+@ 0
+  $string Hello world!
+  dump