AbstractVision v0.3.3

• Packaging: add shared native install profiles. abstractvision[apple] and
  abstractvision[all-apple] install the full local macOS vision stack;
  abstractvision[gpu] installs the Diffusers/Torch GPU stack; and
  abstractvision[all-gpu] installs Diffusers plus stable-diffusion.cpp
  bindings for full local GPU-capable deployments.
• Docs/tests: document and verify the Apple/GPU profile aliases while keeping
  the base package lightweight and remote/OpenAI-compatible by default.