Serialize node links instead of widget values

Syncing litegraph widget state is kinda annoying, and unnecessary since
everything will be moved to separate UI component nodes. Instead I
modified the input slot type to store the min/max/step to be copied into
the default UI node later. Now nothing uses litegraph's widgets anymore

src/lib/IComfyInputSlot.ts

@@ -0,0 +1,16 @@
+import type { INodeInputSlot } from "@litegraph-ts/core";
+
+export type ComfyInputConfig = {
+    min?: number,
+    max?: number,
+    step?: number,
+    precision?: number,
+    defaultValue?: any,
+    values?: any[],
+    multiline?: boolean
+}
+
+export default interface IComfyInputSlot extends INodeInputSlot {
+    serialize: boolean
+    config: ComfyInputConfig // stores range min/max/step, etc.
+}