Make web search a default agent skill with You.com as the default provider

[shatfield4]

Pull Request Type

• ✨ feat (New feature)
• 🐛 fix (Bug fix)
• ♻️ refactor (Code refactoring without changing behavior)
• 💄 style (UI style changes)
• 🔨 chore (Build, CI, maintenance)
• 📝 docs (Documentation updates)

Relevant Issues

resolves #

Description

• promote web search from a configurable skill to a default-enabled skill
• default the search provider to You.com's keyless free tier when no provider is configured
• fall back to DuckDuckGo automatically on any You.com failure or empty response
• use all You.com result snippets and published dates for richer search context
• prevent stale skill settings from reenabling a skill an admin has disabled
• keyless You.com tier allows 100 queries/day per IP (docs) and responds 402 once users hit limit

Visuals (if applicable)

Additional Information

Developer Validations

• I ran yarn lint from the root of the repo & committed changes
• Relevant documentation has been updated (if applicable)
• I have tested my code functionality
• Docker build succeeds locally