Add documentation how to use repairwheel with 'pip install .'

[PiotrCzapla]

Hello, I appreciate your efforts in creating this tool. I'm trying to resolve a broken building system in one of the open-source libraries, and I found it quite challenging to discover the proper approach. After spending hours searching and consulting ChatGPT, I eventually found a solution that works, but I'm still uncertain if it's the right method. Given the limited information available on how to correctly build a wheel with shared libraries, could you consider adding a few paragraphs to your README file?

While it's relatively easy to locate your library, when searching for issues related to rpath, getting the information how to make pip install . to call your tool is quite difficult. My current approach is as follows.

from pathlib import Path
from setuptools import setup, Command
from setuptools.command.bdist_wheel import bdist_wheel
import subprocess

class RepairWheel(bdist_wheel):
    def run(self):
         super().run()

         wheel_path = next(Path(self.dist_dir).glob(f"{self.distribution.get_name()}*.whl"))
         # Create a temporary directory for the repaired wheel
         import tempfile
         with tempfile.TemporaryDirectory(prefix='repaired_wheel_') as tmp_dir:
             tmp_dir = Path(tmp_dir)
             subprocess.call(['repairwheel', wheel_path, '-o', tmp_dir])

             # We need to glob as repairwheel may change the name of the wheel 
             # on linux from pywhispercpp-1.2.0-cp312-cp312-linux_aarch64.whl 
             #            to pywhispercpp-1.2.0-cp312-cp312-manylinux_2_34_aarch64.whl
             repaired_wheel = next(tmp_dir.glob("*.whl"))
             self.copy_file(repaired_wheel, wheel_path)
             print(f"Copied repaired wheel to: {wheel_path}")
     
setup(
        # ...
        cmdclass={
             'bdist_wheel': RepairWheel,
        },
        # ...
)

Actually afer some inspection I'm pretty sure that it isn't working well as I have copies of my .dylib in two places (in wheel/ and wheel/package/.dylibs/) but at least they reference each other.
If I find a way to fix this I will update the ticket.