feat(vm): in type errors, display the bad values as code, to add the quotes around strings

Author: SuperFola

include/Ark/VM/VM.inl

@@ -325,7 +325,7 @@ inline void VM::call(internal::ExecutionContext& context, const uint16_t argc, V
                 ErrorKind::Type,
                 fmt::format(
                     "{} is not a Function but a {}",
-                    maybe_value_ptr->toString(*this), std::to_string(call_type)));
+                    maybe_value_ptr->toString(*this, /* show_as_code= */ true), std::to_string(call_type)));
         }
     }
 

tests/unittests/resources/DiagnosticsSuite/runtime/call_let_mut_not_a_function.expected

@@ -1,4 +1,4 @@
-TypeError: hello is not a Function but a String
+TypeError: "hello" is not a Function but a String
 
 In file tests/unittests/resources/DiagnosticsSuite/runtime/call_let_mut_not_a_function.ark:1
     1 | (mut output ((let T "hello") (mut T print)))