fixes #5591

Summary

Add optional text-to-speech (TTS) feedback for pie-menu selections and toolbar Play/Stop actions, plus a top-right toggle to enable/disable speech. This improves accessibility for users who rely on audio confirmation.

Approach

• Label Normalization: Cleaned up pie-menu labels (handling icons and symbols) to ensure they are announced correctly via an aria-live region.
• Speech Synthesis: Utilized speechSynthesis to speak labels on selection when the global toggle is active.
• UI Integration: Added a toggle button near the "Collapse" icon to control TTS globally.
• Toolbar Enhancements: Wired Play/Stop toolbar buttons to announce their actions, respecting the user's toggle preference.

Affected Files

• piemenus.js — Label normalization, aria-live announcements, TTS hooks, global toggle flag.
• wheelnav.js — Triggers for announcements and TTS on menu item clicks.
• artwork.js — Added new speaker icon SVG for the toggle button.
• turtles.js — Toggle button implementation and top-right layout adjustments.
• toolbar.js — Implementation for Play/Stop button speech logic.

Video Proof

Notes for Maintainers

• Regarding the Demo Video: For some reason, the actual audio output of the instrument selection in piemenu was not captured during the recording, but the feature is fully functional.
• Audio Coexistence: The TTS feedback works alongside the instrument sounds and does not cancel them.
• Open to Feedback: If there are any other changes you want to suggest, I am more than happy to amend them!

Environment

• Device type: [e.g., Desktop]
• Operating System: [e.g., Windows 11]
• Browser: [e.g., Chrome]
• Version of Software/Project: current master