feat: cursor-based pagination on blocks endpoint

[zone117x]

Closes #2043

Supports a new cursor query param. The offset param continues to work but with a max page limit. Page random-access is possible when using both together.

This approach is generalizable and should work with other listing endpoints like transactions in future PRs.

Example usage:

GET /extended/v2/blocks?limit=3

{
  limit: 3,
  offset: 0,
  total: 14,
  cursor: '0x0000000000000000000000000000000000000000000000000000000000000014',
  next_cursor: null,
  prev_cursor: '0x0000000000000000000000000000000000000000000000000000000000000011',
  results: [
   { height: 14, ... },
   { height: 13, ... },
   { height: 12, ... }
  ],
}

GET /extended/v2/blocks?limit=3&cursor=0x0000000000000000000000000000000000000000000000000000000000000011

{
  limit: 3,
  offset: 0,
  total: 14,
  cursor: '0x0000000000000000000000000000000000000000000000000000000000000011',
  next_cursor: '0x0000000000000000000000000000000000000000000000000000000000000014',
  prev_cursor: '0x0000000000000000000000000000000000000000000000000000000000000008',
  results: [
   { height: 11, ... },
   { height: 10, ... },
   { height: 9, ... }
  ],
}

GET /extended/v2/blocks?limit=3&cursor=0x0000000000000000000000000000000000000000000000000000000000000011&offset=2

{
  limit: 3,
  offset: 0,
  total: 14,
  cursor: '0x0000000000000000000000000000000000000000000000000000000000000009',
  next_cursor: '0x0000000000000000000000000000000000000000000000000000000000000012',
  prev_cursor: '0x0000000000000000000000000000000000000000000000000000000000000006',
  results: [
   { height: 9, ... },
   { height: 8, ... },
   { height: 7, ... }
  ],
}

GET /extended/v2/blocks?limit=3&cursor=0x0000000000000000000000000000000000000000000000000000000000000008&offset=-2

{
  limit: 3,
  offset: 0,
  total: 14,
  cursor: '0x0000000000000000000000000000000000000000000000000000000000000010',
  next_cursor: '0x0000000000000000000000000000000000000000000000000000000000000013',
  prev_cursor: '0x0000000000000000000000000000000000000000000000000000000000000007',
  results: [
   { height: 10, ... },
   { height: 9, ... },
   { height: 8, ... }
  ],
}

[github-actions]

Vercel deployment URL: https://stacks-blockchain-q866qi2h7-hirosystems.vercel.app 🚀

[codecov]

Codecov Report

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[rafaelcr]

LGTM!

[blockstack-devops]

🎉 This PR is included in version 8.0.0-beta.6 🎉

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[blockstack-devops]

🎉 This PR is included in version 8.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀