Rename PascalCase project references to all lowercase

[sfloess]

Summary

Per FlossWare org convention, all project names should be lowercase. This repo uses PascalCase names (VirtOS, PxeOS) in documentation and some Java source files. These should be virt-os and pxe-os respectively.

What to change

• VirtOS → virt-os
• PxeOS → pxe-os
• Fix GitHub URLs referencing PascalCase repo names

Affected files (10)

Docs: AI_CAPABILITIES.md, README.md, VIRTOS_INTEGRATION.md, docs/ARCHITECTURE.md, examples/multi-tier/README.md, platform-vm-management/README.md

Java source: MarketplaceDeploymentStatus.java, WorkloadPlacementScheduler.java, MlProjectManager.java, TrainingJobScheduler.java

Rule

FlossWare org standard: all repo names and project name references are lowercase kebab-case.