venv: make binary or library from C/C++ installable to `./venv/bin/` or `./venv/lib/`

Feature or enhancement

Make C/C++ library or executable which the python library relied on be able to be installed into ./.venv/lib or ./.venv/bin where ./.venv is the path to virtual env root.

Also ./.venv/include/.

As a result, it can be more flexible to add additional C/C++ dependency without system supervisor permission.

Pitch

Sometimes, python libraries depend C/C++ libraries. Currently, the C/C++ library need to installed system wide. It is a great inconvenience.

If a required C/C++ library is not provided by Linux distro. Just install it into virtual env directory without polluting system-wide environment.

For executable, nothing is needed for functionality. For library, it would be solvable by properly setting LIBRARY_PATH and LD_LIBRARY_PATH.

Comece rastreando como os ambientes virtuais lidam atualmente com bibliotecas nativas, executáveis e headers, prestando atenção a .venv/bin, .venv/lib e .venv/include. Defina o comportamento de instalação e de variáveis de ambiente necessário para dependências de C/C++ e, antes da implementação, identifique os testes e a documentação relevantes; considera-se concluído quando um pacote Python puder usar essas dependências sem uma instalação em todo o sistema.