Anubis Collection, Code rewrites, ItemsParser

Warning: Currently CS:GO servers are under heavy load. This means that you would probably get more "Couldn't get more than 10 floats from marketplace" errors than usually. I can't do anything about it, so you just got to wait / find time with less load.

What's Changed

• Added new Anubis Collection and changed "AWP | Doodle Lore"
• Rewrote ItemsParser to use game files instead of csgostash.com
• Remade NextCombination method to actually support skipping, instead of running in a loop.
• Added toggle to use Parallel.For instead of task pools. Testing shows a slight improvement on AMD CPUs.
• Synced all namespaces to organize codebase
• Bump Newtonsoft.Json from 13.0.2 to 13.0.3 by @dependabot in #20

Full Changelog: v.1.4.0...v.1.4.1