Enable Zstd WebSocket compression by default

[Lyptik]

Summary

Enable compressed Augmenta WebSocket streams in the Three.js example and ship the matching browser-side decompressor.

• sets useCompression: true while keeping polling behavior unchanged
• initializes zstddec before opening the Augmenta WebSocket
• injects a synchronous decompressor into the Augmenta JavaScript SDK
• aligns the default with Unity, TouchDesigner and VVVV
• vendors the browser decoder into the self-contained GitHub Pages artifact
• adds a real Zstd decode fixture test plus static integration checks
• records the third-party license

The built Pages artifact remains CDN-independent at runtime.