Add Affonso plugin

[zilvestro]

Add Affonso plugin

What this adds

Affonso — a plugin entry that gives Grok Bots API/CLI access to affiliate-program data and keeps all writes, messages, and money movement behind explicit approval.

Checklist

• This PR adds exactly ONE new file under content/.
• It follows CONTRIBUTING.md, including the required plugin fields and G1–G8.
• npm run validate passes locally.
• slug is kebab-case and exactly matches the filename.
• I ran / used this myself end to end — it works today.
• Every URL in the frontmatter resolves to real, relevant content.
• The prompt is complete and links the official API docs and Agent Skills repository.
• The body is plain Markdown with no raw HTML.
• The entry uses status: proposed and does not set verified_at.
• The entry describes concrete agent capabilities and approval boundaries rather than unverifiable outcomes.
• I license this contribution under CC BY 4.0 (attribution: entry author + grokbot.dev).

Where it came from

• Product: https://affonso.io
• API documentation: https://docs.affonso.io/api/introduction
• Agent Skills and CLI workflow: https://github.com/affonso-io/agent-skills

[asimac2001]

Merged and live — exemplary submission (the approval-gated prompt design is exactly the quality bar). Verified affonso.io, the API docs, agent-skills repo, and @affonso/cli on npm; flipped to live + pulled your icon. Listing: https://grokbot.dev/plugins/affonso/ 🎉