feat(small-business): add RocketReach as a lead data connector (1.35.2) - #1413

Scope guard: a non-member PR may only ADD marketplace.json entries whose source repo already backs a live plugin here. - changes files other than .claude-plugin/marketplace.json: small-business/.claude-plugin/plugin.json, small-business/.mcp.json, small-business/README.md, small-business/shared/connector-neutrality.md, small-business/skills/call-list/SKILL.md, small-business/skills/grow-pipeline/SKILL.md, small-business/skills/lead-finder/SKILL.md, small-business/skills/lead-finder/reference/sourcing.md, small-business/skills/lead-triage/SKILL.md, small-business/skills/lead-triage/reference/hubspot-scoring.md, small-business/skills/marketing-monday/SKILL.md, small-business/skills/outreach-composer/SKILL.md, small-business/skills/smb-router/reference/connector-map.md

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