Refine Project VISION.md with Core Architectural Concepts

This ticket documents the final, surgical refinements made to the VISION.md file. Following the initial update, this effort integrated the core technical differentiators of Neo.mjs directly into the vision's three pillars to provide a stronger architectural foundation for the strategic narrative.

The key refinements include:

1. Pillar 1 (Performance): Clarified that the "Off-the-Main-Thread" (OMT) architecture is enabled by a VDOM specifically designed as a cross-thread communication protocol.
2. Pillar 2 (Simplicity): Expanded on the Unified Config System to highlight that it applies to all classes (not just components), thus avoiding the "component-ize everything" trap common in other frameworks.
3. Pillar 3 (AI Partnership): Articulated that the framework's architecture is inherently AI-native due to its use of a JSON Blueprint instead of JSX, making the application's structure natively understandable to LLMs.