Initial project import

tools/v/vlib/compress/lz/interop/README.md

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+## LZ Interop Validation (V, C, Python)
+
+This tool validates:
+
+- V compress/decompress roundtrips for all formats: `lz77`, `lz78`, `lzw`,
+  `lz4`, `lzss`, `lzma`, `lzjb`
+- a C `lz77`-like reference implementation
+- a Python `lz77`-like reference implementation
+
+The C/Python references are intentionally simple so the benchmark is easy to run
+without external dependencies.
+
+### Run
+
+```bash
+cd /home/jalon/git/v
+./vnew run vlib/compress/lz/interop/lz_interop.v 2>&1
+```
+
+Optional args:
+
+1. validation rounds (default: `40`)
+2. input size in bytes (default: `524288`)
+
+Example:
+
+```bash
+cd /home/jalon/git/v
+./vnew run vlib/compress/lz/interop/lz_interop.v 25 262144 2>&1
+```
+
+### Output
+
+The tool prints validation status lines only (no timing output).
+
+When helpers are available, it also cross-validates compression/expansion
+interoperability with V (`lz77`) in both directions:
+
+- V compress -> C decompress
+- C compress -> V decompress
+- V compress -> Python decompress
+- Python compress -> V decompress
+
+If `cc`/`gcc` or `python3` are missing, that row is skipped with a message.