rework lora and patching system

and dora etc - backend rework is 60% finished
And I also removed the webui’s extremely annoying lora filter from model versions.

backend/utils.py

@@ -0,0 +1,30 @@
+import torch
+
+
+def set_attr(obj, attr, value):
+    attrs = attr.split(".")
+    for name in attrs[:-1]:
+        obj = getattr(obj, name)
+    setattr(obj, attrs[-1], torch.nn.Parameter(value, requires_grad=False))
+
+
+def set_attr_raw(obj, attr, value):
+    attrs = attr.split(".")
+    for name in attrs[:-1]:
+        obj = getattr(obj, name)
+    setattr(obj, attrs[-1], value)
+
+
+def copy_to_param(obj, attr, value):
+    attrs = attr.split(".")
+    for name in attrs[:-1]:
+        obj = getattr(obj, name)
+    prev = getattr(obj, attrs[-1])
+    prev.data.copy_(value)
+
+
+def get_attr(obj, attr):
+    attrs = attr.split(".")
+    for name in attrs:
+        obj = getattr(obj, name)
+    return obj