Move parse string table logic to method

[skjolber]

Move parse string table logic to dedicated method.

This allows for parseStringTable(..) overrides in subclass, specificially for interning the strings.

[leonardehrenfried]

This looks ok but would it not be possible to implement the specialised interning in this repository?

[leonardehrenfried]

Or extract a specific StringInterner interface for which you can supply your own implementation? I'm a bit hesitant to introduce inheritance if there are alternatives.

[leonardehrenfried]

Hmm, I just realised that this already relies on inheritance... but maybe we can find a nicer design pattern for this feature.

[skjolber]

Later realized could just use Map<ByteString, String> for interning; converting ByteString to String (with toStringUtf8) for new values. So then the strings array could be avoided all together / be of type ByteString instead.