make launch.py run installers for extensions that have ones

import platform

dir_repos = "repositories"

dir_extensions = "extensions"

python = sys.executable

git = os.environ.get('GIT', "git")

index_url = os.environ.get('INDEX_URL', "")

        else:

            print("Not a git clone, can't perform version check.")

    except Exception as e:

        print("versipm check failed",e)

        print("version check failed", e)

def run_extensions_installers():

    if not os.path.isdir(dir_extensions):

        return

    for dirname_extension in os.listdir(dir_extensions):

        path_installer = os.path.join(dir_extensions, dirname_extension, "install.py")

        if not os.path.isfile(path_installer):

            continue

        try:

            print(run(f'"{python}" "{path_installer}"', errdesc=f"Error running install.py for extension {dirname_extension}"))

        except Exception as e:

            print(e, file=sys.stderr)

def prepare_enviroment():

    run_pip(f"install -r {requirements_file}", "requirements for Web UI")

    run_extensions_installers()

    if update_check:

        version_check(commit)

            return getattr(collections, name)

        if module == 'torch._utils' and name in ['_rebuild_tensor_v2', '_rebuild_parameter']:

            return getattr(torch._utils, name)

        if module == 'torch' and name in ['FloatStorage', 'HalfStorage', 'IntStorage', 'LongStorage', 'DoubleStorage']:

        if module == 'torch' and name in ['FloatStorage', 'HalfStorage', 'IntStorage', 'LongStorage', 'DoubleStorage', 'ByteStorage']:

            return getattr(torch, name)

        if module == 'torch.nn.modules.container' and name in ['ParameterDict']:

            return getattr(torch.nn.modules.container, name)