Initial project import

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

@@ -0,0 +1,16 @@
+# zlib interop checker
+This helper verifies interoperability between:
+- V module: `compress.zlib`
+- C helper linked with `libz`
+- Python stdlib: `zlib`
+  It runs deterministic test vectors, compresses each vector with all three producers, then
+  cross-decompresses every produced stream with all three consumers.
+  A case passes only if every decompressed output is byte-identical to the original input.
+## Run
+```bash
+./vnew run vlib/compress/zlib/interop/zlib_interop.vsh
+```
+## Requirements
+- `python3` with the stdlib `zlib` module
+- a C compiler (`cc`, `gcc`, or `clang`)
+- `libz` development headers and linker support (`-lz`)