Publish wheels for Python 3.15 (cp315) #245

ssh2-python==1.2.0.post1 (latest, 2025-10-12) ships wheels for cp310–cp314 (+ cp314t) only. On Python 3.15, pip/uv falls back to the sdist and builds from source, which needs a compiler toolchain plus OpenSSL/zlib headers and links the system libcrypto instead of the bundled one.

Could you publish cp315 (and cp315t) manylinux / macOS wheels?