fix: generate serializers for nullable types correctly

fix: syntax errors in list attribute generator

feat: store type converters in dictionary to speed up converting

feat: add base packet list source generators

fix: handle non-nullable values correctly in packet index code generator

feat: add possibility to add fixed length for packet lists

fix: correctly return results from type converter repository

feat: add fc packet

feat: add possibility to add reason to PacketParameterSerializerError

fix: do not overwrite packet types by header

feat: add bool type converter

feat: add nullable type converter

feat: allow packet attributes only on parameters

feat: return diagnostic error if there is same packet index twice

feat: add packet types from the packets assembly to PacketTypesRepository

choer: add NosSmooth.PacketSerializersGenerator to the solution

fix: bugs in packet types repository add packet

fix: accept interface types repositories

feat: add reference to generator package

feat: implement adding generated serializers