Expand monitoring section

[JosepBove]

Redesigns the monitoring section with three improvements:

• Adds a First Principles section to the overview (know what/why you monitor, act on alerts, redundancy)
• Expands the guidelines page with key principles, monitoring strategies across 5 tracks (transactions, contract events, bridges, oracles/governance, node/network), and reliability guidance for alert channels
• Adds a new Tools catalog page covering free/OSS options (Forta Firewall, BlockScout, Prometheus+Grafana) and commercial platforms (Tenderly, Guardrail, Hexagate, Hypernative, Etherscan), including pricing, chain support, and reliability considerations

Closes #43 and #56

[github-actions]

Sidebar Configuration Reminder

This PR includes added, renamed, or removed documentation files:

• docs/pages/config/index.mdx (added)
• docs/pages/monitoring/tools.mdx (added)

Please ensure that:

• The sidebar in vocs.config.tsx has been updated to include these files
• New content has the dev: true parameter so it's marked as under development
• Sidebar links match the file paths - use the preview deployment to verify

See Contributing Guide – Sidebar & Navigation for more details.

---

_{This is an automated reminder. If this PR doesn't need sidebar changes, you can ignore this message.}

[github-actions]

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[scode2277]

Thanks for this contribution @JosepBove!

The monitoring framework was in very much need of contributions! The content is solid and follows the right tone and structure!

As you are the first contributor putting effort in expanding this framework, would you also be up to becoming its steward? Here you can find the specs of the role -> https://frameworks.securityalliance.org/contribute/stewards/ .
Let us know and, in case you are positive, you can just go ahead and update the contributors database like this ->

"role": "steward", <- update the role
...
"badges": [
  { "name": "Framework-Steward", "assigned": "2026-03-17", "framework": "Monitoring" }, <- add this badge

You can have a look at the other Stewards here -> https://frameworks.securityalliance.org/contribute/spotlight-zone#stewards

[JosepBove]

I am happy to become Steward, let me do the change!

[scode2277]

Thanks again @JosepBove for this contribution and to be the Steward of the monitoring framework!

Good to go for me @mattaereal!