Add network production runbooks for Aggregator

[jpraynaud]

Content

This PR includes the addition of production runbooks for the production network for the aggregator:

• Add a Cover page
• Add a Genesis manually guide
• Add a Update protocol parameters guide
• Add a Recompute certificates hash guide
• Add a Fix terraform lock guide
• Add a SSH access to VM of networks guide
• Move the Era markers guide
• Move the Signer registrations monitoring

Pre-submit checklist

• Branch
  • Commit sequence broadly makes sense
  • Key commits have useful messages
• PR
  • No clippy warnings in the CI
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested

Issue(s)

Closes #1085

[github-actions]

Test Results

    3 files  ±0    16 suites  ±0   6m 21s ⏱️ +47s
656 tests ±0  656 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
696 runs  ±0  696 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit d166b86. ± Comparison against base commit f02a536.

♻️ This comment has been updated with latest results.