docs: add Browserless MCP browser automation example

[andyMrtnzP]

Description

Adds a browserless.ipynb example to docs/examples/tools/ covering Browserless — a hosted browser-automation MCP server. Browserless exposes 10 tools over a single streamable-HTTP endpoint (smart scraper, search, map, crawl, export, performance, function, download, plus a multi-turn browser agent), all auto-importable via llama-index-tools-mcp with no partner package required. Browser sessions are pinned by Mcp-Session-Id, so multi-turn ReAct loops preserve browser state across calls — the example demonstrates both stateless single-shot tools and the multi-turn browserless_agent.

New Package?

Did I fill in the tool.llamahub section in the pyproject.toml and provide a detailed README.md for my new integration or package?

• [] Yes
• No

Version Bump?

Did I bump the version in the pyproject.toml file of the package I am updating? (Except for the llama-index-core package)

• Yes
• No

Type of Change

Please delete options that are not relevant.

• This change requires a documentation update

How Has This Been Tested?

Your pull-request will likely not be merged unless it is covered by some form of impactful unit testing.

• I added new unit tests to cover this change
• I believe this change is already covered by existing unit tests

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added Google Colab support for the newly added notebooks.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I ran uv run make format; uv run make lint to appease the lint gods

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[andyMrtnzP]

Executed end-to-end against the live mcp.browserless.io endpoint with claude-sonnet-4-6. All 16 code cells produced real outputs. No unit test surface for an example notebook.