Pass message or error code with assertions

## Problem

Currently we have a complicated process to find the reason for an assertion failure. It would be great if the assertions can return a error message or if we have size limitation, a specific error byte and return it on assert failure.

## Solution

Send a direct message to caller
```py
Assert( , Bytes("failure reason"))
```
OR
Send a number or byte that can be mapped to a error message
```py
Assert(, Int(123))
```