fix: class instance scope wasn't getting set up from call inside of c…

…lass function

demo:
```
class Funny {
    $h = 1;
    func A() { B() }
    func B() { print $h }
}
#Funny:new().A()
```
Would crash because B is executed without a ClassFunctionScope

RCaron/Motor.cs

@@ -1507,7 +1507,7 @@ public bool TryCallFunction(string name, FileScope fileScope, CallLikePosToken?
             var definition = scope.ClassInstance.Definition;
             if (definition.Functions?.TryGetValue(name, out var func2) ?? false)
             {
-                result = FunctionCall(func2, callToken, argumentTokens, classInstance, pipeline: pipeline);
+                result = FunctionCall(func2, callToken, argumentTokens, scope.ClassInstance, pipeline: pipeline);
                 return true;
             }
         }