[FEATURE] Add speech-to-text support in chat input

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

native voice input in the Claude Code VSCode extension chat box

Proposed Solution

native voice input in the Claude Code VSCode extension chat box

Alternative Solutions

_No response_

Priority

Low-Moderate

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_