Follow parameter annotations in REPL type documentation; support enums

Referenced types are now also discovered through the parameter annotations of type members and
facade methods (not only through return types), such that e.g. SymbolKind (a parameter type of
LanguageServerSymbol.iter_ancestors) is documented along with LanguageServerSymbol. Enums are
documented with their members and values. The lsp facade declares SymbolKind as a referenced type.

test/serena/test_repl_tool.py

@@ -72,6 +72,10 @@ class TestReplExecution:
         assert type_info == repl.execute('s.info("LanguageServerSymbol")')
         assert "get_name_path() -> str" in type_info and "iter_children()" in type_info
         assert "to_dict" not in type_info  # not among the curated members
+
+        # types referenced by parameters are documented as well; enums are documented with their members
+        assert "enum SymbolKind" in type_info and "SymbolKind.Class = 5" in type_info  # via iter_ancestors(up_to_symbol_kind)
+        assert "enum SymbolKind" in repl.execute('s.info("SymbolKind")')
         assert "represent()" not in repl.execute('s.info("LspSymbolCollection")')  # the representation mechanism is not exposed
 
     def test_contained_types_are_documented_once_per_session(self, repl: SerenaRepl) -> None: