Summary

• Renames plugins/mcp → plugins/quicknode (commands are namespaced by plugin name, so this gives /quicknode:* instead of /mcp:*)
• Merges in the 7 slash commands, rpc-troubleshooter subagent, and quicknode-skill from the standalone quicknode-claude-plugin repo — one plugin now covers MCP + commands + subagent + skill
• Ports the skill's weekly sync script/workflow (re-pathed to plugins/quicknode/skills/quicknode-skill, reviewer 0xsergen)
• Re-points all path references: both marketplace manifests, server.json subfolder, gen-install-links.mjs, publish-mcp-registry.yml, install docs, READMEs
• Cursor/Windsurf/other ecosystems are unaffected — those still only see the MCP server; commands/subagent/skill are Claude Code-only for now

Known follow-ups (not in this PR)

• swap.md references swap-api-reference.md, which doesn't exist yet upstream in blockchain-skills — owned separately
• Cross-ecosystem translation of commands/skills (Cursor rules, Windsurf, etc.) — tracked separately
• Local testing of the merged plugin in Claude Code before going public

Test plan

• /plugin marketplace add this branch locally and confirm /quicknode:* commands, the subagent, and the skill all load
• Confirm MCP server still connects for Cursor/Windsurf per existing docs