Rewrite database model

[WaldemarLehner]

WIP PR for tracking changes

This PR recreates a new "Core" Library which a UI Layer should integrate with.

Here's a quick overview of what's been done in this PR

• Define Low-Level Dexie Schema
• Define Migration Structure
• Define (coarse) Interface for Interacting with Library
• Define "rich" Objects proxying low-level data representation.
• Write logic for parsing Tricks / Combos from YAML
• Write logic for checking Validity of Tricks / Combos
• Write migration logic for archiving / unarchiving Tricks and Combos

This should be done before merging this PR into the rewrite-Branch

• [x] Discuss and implement all needed access functions
  These will be added as needed by the UI layer
• [ ] Test Proxy-Objects
• [ ] Further Test Archiving / Unarchiving Logic

239 - Relevant Discussion