[STG-1680] docs: show bb CLI usage alongside curl in search, fetch, functions skills

[shrey150]

Summary

• Adds bb CLI examples to search, fetch, and functions skills so agents try the CLI first
• CLI examples appear before cURL in SKILL.md, REFERENCE.md, and EXAMPLES.md
• Adds "The CLI is the preferred interface" section to browserbase-cli SKILL.md with a mapping (bb search vs curl, bb fetch vs curl, etc.)
• Removes redundant bullet from browserbase-cli that sent agents away to the fetch skill

Test plan

• Verify bb search, bb fetch, bb functions invoke commands shown match current CLI flags
• Confirm no existing cURL or SDK examples were removed — only CLI alternatives added alongside them

🤖 Generated with Claude Code

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Note

Low Risk
Low risk documentation-only updates that mainly reorder/add CLI snippets; risk is limited to potential mismatch between documented CLI flags and the actual bb interface.

Overview
Updates Browserbase skill docs to prefer the bb CLI over direct HTTP calls by adding CLI-first examples and references for fetch, search, and functions invoke.

Adds a new “CLI is the preferred interface” section in skills/browserbase-cli/SKILL.md that maps common API operations (search/fetch/functions/resources) to their bb equivalents, and refreshes tips/best-practices text to include the relevant CLI flags (e.g., --output, --allow-redirects, --proxies, --num-results).

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