- remove IrModule header
- put IrDeclaration and its body into separate files
- use only one type of IrData index
- separate deserialization of declarations and its bodies
- introduce FqName message
There was one monolith protobuf at irHeader.knd, it was
split up onto 4 parts due to performance issues:
- a small irHeader with some basic info about a module
- symbols table
- types table
- strings table
These 3 tables are then mmapped and accessed by index.
Roman Artemev