chore(paged): keep patches/ patch-only; README to backend root, docs to docs/

The llama-cpp-localai-paged patches/ dir had accumulated docs, plots, a csv,
dev .cpp harnesses, and a dead FP4-MoE kernel scaffold after an earlier git-mv.
Restore the invariant that patches/ holds only the .patch series.

Moves:
- patches/paged/README.md -> README.md (canonical doc at the backend root)
- patches/paged/{PIN_SYNC_c299a92c,PAGED_BITEXACT_NOTE,LOCALAI_LLAMACPP_BACKEND_PLAN,UPSTREAM_LAYER2_SCOPE}.md,
  final_benchmark.csv, qwen36_*.png, paged-burst-bench.cpp, paged-reclaim-unit.cpp -> docs/
- patches/README.md -> docs/PATCH_MAINTENANCE.md (unique patch-regen recipe not in the canonical README)

Deletes:
- patches/BENCHMARKS.md (superseded by README section 4 + the dev-notes section)
- patches/kernel/ (dead FP4-MoE scaffold, never in the 0001-0030 apply glob, zero refs repo-wide)

Repoint every reference to the moved files: README internal links (docs/ + the
.github links drop from 5x ../ to 3x ../), .agents/llama-cpp-localai-paged-backend.md,
.github/scripts/paged-canary-apply.sh, .github/workflows/llama-cpp-paged-canary.yml,
the wrapper Makefile, backend/cpp/llama-cpp/grpc-server.cpp, backend/index.yaml,
docs/content/features/backends.md, gallery/index.yaml.

The build apply glob PAGED_PATCHES_DIR/0*.patch (PAGED_PATCHES_DIR := .../patches/paged)
is unchanged and still resolves to the 28 patches.

Assisted-by: Claude:opus-4.8 [Claude Code]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

docs/content/features/backends.md

@@ -125,7 +125,7 @@ For getting started, see the available backends in LocalAI here: https://github.
 LocalAI supports various types of backends:
 
 - **LLM Backends**: For running language models (e.g., llama.cpp, vLLM, SGLang, transformers, MLX)
-  - **`llama-cpp-localai-paged`**: LocalAI's paged-attention llama.cpp variant - on-demand paged KV cache plus a decode-first prefill budget, tuned for NVFP4 dense/MoE on Blackwell/GB10. Same upstream llama.cpp pin as the stock `llama-cpp` backend, reusing its gRPC server; the paged engine is enabled per-model via the `paged_kv` / `max_batch_tokens` options. For Qwen3.5 gated-DeltaNet (hybrid SSM) models you can additionally set `options: [ssm_bf16_tau:<tokens>]` to enable the reduced-precision hybrid SSM-state fast mode: fast-decaying recurrent heads (memory length tau below the threshold, e.g. `32` / `64`) persist their state as bf16, halving that head's decode byte stream. Default off (`0`) keeps every head f32 and is bit-exact; when enabled the mode is **not** bit-exact (~91% same-top-p ceiling - see `backend/cpp/llama-cpp-localai-paged/patches/paged/README.md` for the quality/throughput profile).
+  - **`llama-cpp-localai-paged`**: LocalAI's paged-attention llama.cpp variant - on-demand paged KV cache plus a decode-first prefill budget, tuned for NVFP4 dense/MoE on Blackwell/GB10. Same upstream llama.cpp pin as the stock `llama-cpp` backend, reusing its gRPC server; the paged engine is enabled per-model via the `paged_kv` / `max_batch_tokens` options. For Qwen3.5 gated-DeltaNet (hybrid SSM) models you can additionally set `options: [ssm_bf16_tau:<tokens>]` to enable the reduced-precision hybrid SSM-state fast mode: fast-decaying recurrent heads (memory length tau below the threshold, e.g. `32` / `64`) persist their state as bf16, halving that head's decode byte stream. Default off (`0`) keeps every head f32 and is bit-exact; when enabled the mode is **not** bit-exact (~91% same-top-p ceiling - see `backend/cpp/llama-cpp-localai-paged/README.md` for the quality/throughput profile).
 - **Speech-to-Text Backends**: For transcription (e.g., whisper.cpp, parakeet.cpp, faster-whisper, NeMo)
 - **Text-to-Speech Backends**: For speech synthesis (e.g., piper, Kokoro, VibeVoice, Qwen3-TTS)
 - **Sound Generation Backends**: For music and audio generation (e.g., ACE-Step)