chore: bump packetserializer abstractions version

chore: move repository url and license to Directory.Build.props

feat(packets): add support for multiple separators after a field

chore: add rest of version prefixes

chore: update versions

chore: update versions

chore: update versions

chore: update dependencies

chore: update to .NET 7

feat: make projects available for netstandard 2.1

chore: add repository url and license to nuget

chore: add nuget description

feat: split packets definitions into separate assembly