feat(packages): add freetoken 0.1.2 NVIDIA MoE inference runtime

Package FreeToken (FlashML-org/FreeToken) — edge-native MoE serving
engine with OpenAI/Anthropic-compatible APIs, serving the `ft` CLI.

- torch-bin 2.11 (CUDA 12.9 wheel build) satisfies the torch>=2.11,<2.12
  pin; extensions link the same cudaPackages.cuda_cudart via a synthetic
  CUDA_HOME (cudart headers + nvcc crt/ headers, no nvcc needed).
- flashlib==0.3.0 vendored from the PyPI wheel (Triton-only; freetoken
  never imports the CuTeDSL GEMM backends, so nvidia-cutlass-dsl is
  omitted via pythonRemoveDeps).
- apache-tvm-ffi overridden to the pinned 0.1.13.post3 with a vendored
  cython 3.3.0 (build needs >=3.2.8, nixpkgs has 3.2.4); pytest skipped
  (upstream runs pytest-xdist with GPU tests).
- Unfree (CUDA EULA) is self-scoped: the package re-imports nixpkgs with
  config.allowUnfree so no flake-level or user config change is needed.
- Optional accel extras (flashinfer/sglang-kernel) and the kernel-cache
  wheel are not packaged; runtime falls back to pure-Triton kernels.
- Verified: nix build .#freetoken, ft --version, python imports check,
  extension RPATHs.

README.md

@@ -18,6 +18,7 @@ A custom Nix overlay and flake providing additional packages not found in upstre
 | `desloppify` | Multi-language codebase health scanner and technical debt tracker for AI agents | AI Coding Agents |
 | `ds4` | DeepSeek 4 Flash and PRO local inference engine for ROCm (Strix Halo) | AI Inference |
 | `freebuff` | The world's strongest free coding agent | AI Coding Agents |
+| `freetoken` | Local MoE-offload LLM inference runtime with OpenAI- and Anthropic-compatible APIs | AI Inference |
 | `graphify` | Turn any folder of code, docs, papers, images, or videos into a queryable knowledge graph | AI Coding Agents |
 | `haivemind` | Multi-model AI consensus, aggregation, and fusion runner for popular AI CLIs | AI Coding Agents |
 | `hipengine` | ROCm-native local LLM inference engine with torch-free runtime for AMD RDNA GPUs | AI Inference |
@@ -150,6 +151,7 @@ nix-overlay/
 │   ├── ds4/                    # DeepSeek V4 Flash/PRO inference engine (ROCm)
 │   ├── flake-inputs/           # Utility for caching flake inputs
 │   ├── freebuff/               # Free coding agent (Codebuff)
+│   ├── freetoken/             # Local MoE inference runtime (NVIDIA CUDA)
 │   ├── graphify/               # Knowledge graph generator for code folders
 │   ├── haivemind/              # Multi-model AI consensus runner
 │   ├── hipengine/              # ROCm-native LLM inference engine for AMD GPUs