Bitwise operation is not supported by Conditional

Unfortunately classes `ConditionParser` and `ExpressionEvaluator` do not support bitwise operations such as flag parsing
```
My_Field
u8 flags 0
conditional flags & ${0x00000001} conditional_field # Same for 'flags & ${0x00000001} != 0'
My_Conditional_Field
end conditional
```
Errors are:
```
IllegalConditionException: Unsupported operation: flags & 1
IllegalConditionException: Given name condition: flags & 1 not found in message fields
```

Start by locating the ConditionParser and ExpressionEvaluator classes and tracing how the sample conditional is parsed and evaluated. Use the reported flags & 1 example and its IllegalConditionException messages as the baseline; done when the conditional can evaluate that bitwise flag expression without those errors.

Written by the indexing model from the issue text.