Update test documentation

[Panadero1]

What MVP does your issue request work on?

• Physics based dice roller
• GM customization options to all input
• Create Exploration or Encounter modes
• Add players/NPCS/monsters/Shops
• Integrated search engine
• Notes Feature
• Documentation & Automation Tools
• Testing

Describe the solution you'd like
For any changes that have been made to the tech stack or testing implementation, add those to the docs