SignalWire Client SDK: Add Client details

[niravcodes]

Documentation Update Pull Request

Description

Add information on the SignalWire Client.

Related Issue

If there's an issue available, link it here: [Issue #](

Type of Change

• New documentation
• Update to existing documentation

Documentation Change Details

• Changes Summary: Brief summary of the changes

Motivation and Context

Why is this change required? What problem does it solve?

Checklist:

• My documentation follows the style guidelines of this project
• I have performed a self-review of my documentation
• My changes generate no new warnings
• Builds successfully locally

Additional Notes

Add any other context about the documentation update here.

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Lighthouse	1 paths audited Performance: 35 (🟢 up 6 from production) Accessibility: 91 (no change from production) Best Practices: 92 (no change from production) SEO: 89 (no change from production) PWA: - View the detailed breakdown and full score reports

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