Add TxScope — Solana multisig pre-signing threat scanner

[txscope-sol]

Summary

Adds TxScope to the monitoring tools and wallet security tools pages as a Solana-native
pre-signing transaction threat scanner for Squads Protocol multisigs.

This addresses the non-EVM tooling gap noted in the current tools page — TxScope is
purpose-built for Solana and serves the "external transaction monitor" role described
in the multisig operations framework (SFC-MS-6.1.3, SFC-TRO-6.1.1).

What TxScope does

• Monitors Squads Protocol vaults for pending proposals
• Simulates transactions against Solana mainnet via Helius RPC
• Generates plain-language threat reports before signers approve
• Detects: durable nonces, authority transfers, withdrawal guard manipulation, known attack patterns, proposer anomalies
• Instruction-level trace and decode with CPI depth
• Risk scoring (0–100) for automated alerting thresholds
• Free on-demand scans; paid tiers for continuous monitoring with Telegram/Slack alerts

Relevance

• Solana-native tooling addressing the EVM gap in the current tools page
• Aligns with SFC-MS-6.1.3 (Multisig Monitoring and Alerts) and SFC-TRO-6.1.1 (Monitoring and Threat Awareness)
• Demonstrated against the Drift Protocol $285M exploit — public case study reports available at txscope.com

Changes

• docs/pages/monitoring/tools.mdx — added TxScope under Commercial / Hosted section
• docs/pages/wallet-security/tools-and-resources.mdx — added TxScope under Monitoring & Alerting > Solana Multisig Monitoring

Website: https://txscope.com

[scode2277]

This PR needs approval of @JosepBove and @pinalikefruit as stewards of the two frameworks touched.

Also, to be merged, we need all the commits to be signed. We made a small guide to fix this here -> https://frameworks.securityalliance.dev/contribute/contributing#fixing-unsigned-commits. Keep in mind that this guide assumes you already have a signing key set up

[pinalikefruit]

Thanks for the support @txscope-sol , everything's fine on my side @scode2277