Squashed 'vendor/ruvector/' content from commit b64c2172

git-subtree-dir: vendor/ruvector
git-subtree-split: b64c21726f2bb37286d9ee36a7869fef60cc6900

crates/rvf/rvf-quant/README.md

@@ -0,0 +1,29 @@
+# rvf-quant
+
+Temperature-tiered vector quantization for RuVector Format.
+
+## Overview
+
+`rvf-quant` provides quantization codecs that reduce vector storage size based on access temperature:
+
+- **f32** -- full precision for hot vectors
+- **f16** -- half precision for warm vectors
+- **u8** -- scalar quantization for cool vectors
+- **binary** -- 1-bit quantization for cold/archive vectors
+- **Automatic tiering** -- promote/demote vectors based on access patterns
+
+## Usage
+
+```toml
+[dependencies]
+rvf-quant = "0.1"
+```
+
+## Features
+
+- `std` (default) -- enable `std` support
+- `simd` -- enable SIMD-accelerated quantization
+
+## License
+
+MIT OR Apache-2.0