ENH: reduce the output generated by the installation step

Meson by default outputs the source and the destination of the files
being copied. Because of how meson-python sets up the installation
destination directory these paths are very long and not interesting
for the user. Suppress this output.

Also remove the "Copying files to wheel..." log line as it does not
add much information. This is mostly done to reduce the number of
colors and styles the meson-python output uses.

mesonpy/__init__.py

@@ -499,7 +499,6 @@ def build(self, directory: Path) -> pathlib.Path:
         with mesonpy._wheelfile.WheelFile(wheel_file, 'w') as whl:
             self._wheel_write_metadata(whl)
 
-            print('{light_blue}{bold}Copying files to wheel...{reset}'.format(**_STYLES))
             with mesonpy._util.cli_counter(
                 len(list(itertools.chain.from_iterable(self._wheel_files.values()))),
             ) as counter:
@@ -816,7 +815,7 @@ def build(self) -> None:
     def install(self) -> None:
         """Install the Meson project."""
         destdir = os.fspath(self._install_dir)
-        self._run(['meson', 'install', '--no-rebuild', '--destdir', destdir, *self._meson_args['install']])
+        self._run(['meson', 'install', '--quiet', '--no-rebuild', '--destdir', destdir, *self._meson_args['install']])
 
     @classmethod
     @contextlib.contextmanager