Add --connect flag docs for browse CLI

[shrey150]

Summary

• Documents the new browse --connect <session-id> global flag across both browser/ and browse/ skills
• Adds flag to Navigation command lists in SKILL.md
• Adds --connect section to Global Flags in REFERENCE.md (behavior, mutual exclusion with --context-id, keepAlive semantics)
• Adds Example 5/6: "Attach to an Existing Browserbase Session" in EXAMPLES.md

Sister PR: browserbase/stagehand#1889

Test plan

• Verify SKILL.md command examples render correctly
• Verify REFERENCE.md flag section is consistent with --context-id pattern
• Verify EXAMPLES.md new example follows existing format

🤖 Generated with Claude Code

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Note

Low Risk
Documentation-only changes describing a new CLI flag; no runtime behavior is modified, so risk is limited to potential user confusion if semantics are inaccurate.

Overview
Adds documentation for the new global browse --connect <session-id> flag to attach the CLI to an existing Browserbase remote session.

Updates the navigation command list in SKILL.md, adds a dedicated --connect section under Global Flags in REFERENCE.md (remote-only, mutually exclusive with --context-id, browse stop disconnect semantics/keepAlive), and introduces a new example in EXAMPLES.md showing how to inspect and disconnect from an externally-created session.

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