Add Peter Todd hash collision bounty case study

[2js56]

/claim #93

Summary

• Adds the Peter Todd hash-collision bounties case study requested in [Case Study] Peter Todd's hash-collision bounties show how Bitcoin Script can fund security disclosures without intermediaries #93.
• Covers the Bitcoin Script bounty mechanism, the 2017 SHA-1 payout, limits, and lessons for funding design.
• Adds the GBOYEE author entry and a local banner asset.

Validation

• npx tsx scripts/validate-content.ts src/content/case-studies/peter-todd-hash-collision-bounties.md
• git diff --check

Fixes #93

[vercel]

Someone is attempting to deploy a commit to the Allo Capital Team on Vercel.

A member of the Team first needs to authorize it.