feat: split packets definitions into separate assembly

Merge pull request #16 from Rutherther/packets-list-inline-serializer

Add generation of packet list inline serializer

feat: split inline generated deserialization into different methods

Merge pull request #12 from Rutherther/packets

Implement custom packet serializer

fix: check for null after popping the string enumerator level

chore: rename type generators to inline converter generators

feat: add inline packet converters generation support

feat: add checking parameter method for the generator

feat: add support for optional parameters

feat: rewrite packet serializer generator

feat: skip to last token of nested levels if possible

fix: generate serializers for nullable types correctly

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

feat: add source generator for basic packet converter