doc: document some additional operators in Person.im

doc/sample/Person.im

@@ -409,6 +409,9 @@ cout put:'Hello, world!' unless x <= 10.
     precedence. in these cases, their associativity determines the order of
     execution.
 
+    - binary operators
+        - package-access (->)
+        - self-access (::)
     - unary operators
         - boolean NOT (not)
         - bitwise NOT (~)
@@ -423,6 +426,7 @@ cout put:'Hello, world!' unless x <= 10.
         - addition (+)
         - subtraction (-)
         - bitwise shift (<<, >>)
+        - comparison (<, >, <=, >=)
         - (in)equality (==, !=)
         - bitwise AND (&)
         - bitwise XOR (^)