Fix basic chat message packet

[kralverde]

Fixes basic chat message packets.

[Snowiiii]

Hey, Im sure what was the problem?, Was it that is use 255 bytes instead of 256 ?

[kralverde]

it looks like the 256 OBO. Additionally some optional types do not have a boolean in-front of them; they are conditional on other things. Namely the previous signatures (based off IDK) and bitset (based off the filter type). Those cannot use the default serialization since it appends a boolean before the value.

[Snowiiii]

So, It generally works now?

[kralverde]

For normal chat messages, yes

[Snowiiii]

Thanks so much. I really see the effort you put into this. Good job 👍