Improve support for building extensions and native modules against MuJoCo PYPI package

### The feature, motivation and pitch

1. (works, but not smooth) For Linux, only the versioned library `libmujoco.so.3.3.0` is available under package root, requiring passing absolute path to the linker. It may be better to have a `libmujoco.so` symlink.
2. (not working) For Windows, the implib is not available in the package.

### Alternatives

_No response_

### Additional context

_No response_