New ScheduleFree support for Flux

[sdbds]

Old version Details

• [ Support new optimizer Schedule free #1250 ]

Whats news?
Because testing found that Flux training works well using AdamWScheduleFree.

1、Add version in requirements.txt and add old schedulefree optimizer like
AdamWschedulefree and SGDScheduleFree
Directly using like --optimizer_type=AdamWschedulefree

2、(Experiment function)Add ScheduleFreeWarpper for using any base torch.opti.optimizer like Adam、RAdam、SparseAdam etc...

use --optimizer_schedulefree_wrapper to open options
use --schedulefree_wrapper_args add extra schedule free args.

SupportList:

from .adadelta import Adadelta
from .adagrad import Adagrad
from .adam import Adam
from .adamax import Adamax
from .adamw import AdamW
from .asgd import ASGD
from .lbfgs import LBFGS
from .nadam import NAdam
from .optimizer import Optimizer
from .radam import RAdam
from .rmsprop import RMSprop
from .rprop import Rprop
from .sgd import SGD
from .sparse_adam import SparseAdam

example:
--optimizer_type= "RAdam"
--optimizer_schedulefree_wrapper
--schedulefree_wrapper_args momentum=0.9, weight_decay_at_y=0.1

[kohya-ss]

Thank you. I'm sorry I couldn't merge the last PR. I'll work on this sooner this time.

[kohya-ss]

After merging, I noticed that the wrapper doesn't seem to work. I get an error TypeError: ScheduleFreeWrapper is not an Optimizer.

I'll try to fix it, but if you know anything about it, please let me know.