Consensus Layer Wiki Page

[shyam-patel-kira]

resolves #185

Wiki PR Checklist

• [x] Overview of CL and beacon-chain
• [x] Slots and epochs
• [x] Validators and attestations
• [x] Committees
• [x] Beacon-chain checkpoints and Finality
• [x] Staking rewards and Penalties
• [x] Consensus mechanisms, algorithms etc
  • [x] Fork-choice rules, BFT, pBFT
  • [x] Reorgs and Reversion
  • [x] Architecture
  • [x] State Transition function