feat: add goldrush skill for blockchain data across 100+ chains

[JayeHarrill]

Description

Adds a GoldRush skill for querying blockchain data across 100+ chains via the GoldRush API by Covalent.

What it does:

• Wallet token balances, transaction history, NFT holdings
• Token prices (historical and current)
• DEX pair monitoring and real-time OHLCV streams via WebSocket
• Pay-per-request access via x402 (no API key required)

Compatible agents: Claude Code, GitHub Copilot, Cursor, Codex, and any SKILL.md-compatible agent

Links:

• Docs: https://goldrush.dev/docs
• npm: https://www.npmjs.com/package/@covalenthq/goldrush-mcp-server
• Agent Skills: https://github.com/covalenthq/goldrush-agent-skills

[aaronpowell]

It looks like you've incorrectly branched from the main branch not staged, and as a result all the materialised plugins are included in this PR.

You can attempt to fix this with a rebase:

git fetch origin staged
git rebase --onto origin/staged origin/main <branch name>
git push --force-with-lease

If that does not resolve it, you can run npm run plugin:clean which will delete the materialised plugins and you can commit that change.