[Docs] Define the "TrustScore" Weighting Formula

[mijinummi]

TrustScore Algorithm Documentation

Description
Provide a clear, accessible explanation of how the weighted reputation algorithm calculates a user’s TrustScore.

Task

• Create docs/trustscore-algorithm.md
• Document the relative weight of:
  • GitHub pull requests
  • Snapshot governance votes
  • Discord messages

Goal
Ensure full transparency in how reputation is calculated, reinforcing trust and accountability in a decentralized system.