split shared.py into multiple files; should resolve all circular reference import errors related to shared.py

modules/mac_specific.py

@@ -4,6 +4,7 @@ import torch
 import platform
 from modules.sd_hijack_utils import CondFunc
 from packaging import version
+from modules import shared
 
 log = logging.getLogger(__name__)
 
@@ -30,8 +31,7 @@ has_mps = check_for_mps()
 
 def torch_mps_gc() -> None:
     try:
-        from modules.shared import state
-        if state.current_latent is not None:
+        if shared.state.current_latent is not None:
             log.debug("`current_latent` is set, skipping MPS garbage collection")
             return
         from torch.mps import empty_cache