feat: add read-only TaskMarket radar skill

[dacode-dev]

Summary

Add taskmarket-radar, a read-only Aeon skill that finds open TaskMarket delegation opportunities with public escrow evidence.

Behavior

• Fetches the public TaskMarket API and filters by keyword, gross reward, expiry, open status, and escrow transaction hash.
• Reports exact task IDs, reward fields, deadlines, competition counts, escrow hashes, and public task URLs.
• Sends one notification only for new or materially changed opportunities and logs each run.
• Never creates, claims, bids, submits, signs, or spends; no credentials are required.
• Treats task descriptions as untrusted data and distinguishes platform opportunities from actual revenue.

Validation

• bash scripts/check-skill-categories.sh
• bin/generate-skills-json
• bin/generate-packs-json
• node scripts/validate-readme-catalog.mjs
• node scripts/validate-skill-packs.mjs
• git diff --check

The new skill is included in the generated first-party catalog and Basics pack. TaskMarket was not present in the checked-out Aeon repository before this change.

[aaronjmars]

Thanks for the contribution! I'm closing this in favor of #865 (taskmarket-delegate), which covers the same GET /api/tasks browse over the identical endpoint, plus create/submit, and is already all-green.

Two blockers here regardless: there's no eyebrowlock.json entry, so ci-skill-integrity hard-fails; and the skill declares mode: read-only but Step 7 appends to memory/logs/${today}.md - the read-only tier blocks Write and >/>>, so that ledger write silently no-ops every run.

Your escrow-tx-hash credibility filter is a genuinely nice idea, though - I'd welcome a small follow-up folding that into #865's browse ranking. Closing as not planned for now.