Update README.md

Added docs skeleton for CowCreateWidgetAsync

Author: sleepCOW

README.md

@@ -1,3 +1,48 @@
-*Text*
+![](https://img.shields.io/badge/UE-5.5.3-green)
+![](https://img.shields.io/badge/UE-5.4.4-green)  
 
-![Autowire](Autowire.gif)
+## List of nodes:
+
+- [`CowCreateWidgetAsync` - Ultimate Create Widget Async](#CowCreateWidgetAsync)
+
+### CowCreateWidgetAsync
+
+Improved Version of Epic's `CreateWidget` and `CreateWidgetAsync` (from `CommonGame`)
+
+This version combines the best of both worlds with general quality-of-life improvements:
+
+## Key Features
+
+- **No Hard References**: Does not introduce a hard reference to the selected widget class in packaged game (similar to `CreateWidgetAsync`).
+- **ExposedOnSpawn Parameters**: Displays any `ExposedOnSpawn` parameters (similar to `CreateWidget`).
+- **Automatic Handling of `ExposedOnSpawn` Variables**: Automatically adds new `ExposedOnSpawn` variables (which `CreateWidget` does not handle).
+- **Widget Class Pin Enhancements**:
+    - Supports linked properties and propagates their class.
+    - Example:
+        
+        Suppose you created a soft class property `MyClass` of type `WBP_BaseWidget` with an exposed member `Text` (so only `WBP_BaseWidget` and derived classes can be selected).
+        
+        If you connect `MyClass` property to the node, it will properly:
+        
+        1. Display any exposed members (`Text` will be shown).
+        2. Set the return type of the node to `WBP_BaseWidget`.
+        (Because the pin type already introduces a hard reference (`SoftClass` property to a type `X` is a hard reference to `X`)
+- **Optimal Return Value**: The return value is always the best possible option that avoids a hard reference.
+It will be either the first native class or the widget class if linked to a pin that introduced a hard reference.
+- **Improved Auto-Wiring**: Proper auto-wiring for `ReturnType` to avoid the common mistake of using the `Then` pin instead of `OnWidgetCompleted`.  
+![Autowire](Autowire.gif)  
+- **User-Friendly Notes**: Generates informative notes when actions might cause errors.
+    - Examples:
+        - Introduction of a hard reference.
+        - Keeping default values of the base class when a pin of the base class is hooked, which may differ at runtime.
+- **Fix for `FKismetCompilerUtilities::GenerateAssignmentNodes`**:
+    - Prevents `DynamicCast` from creating a hard reference through native properties with `BlueprintSetter`.
+    - See `FCowCompilerUtilities::GenerateAssignmentNodes` for implementation details.
+
+## Known Limitations
+
+1. Works only with **EventGraph/Macro** (due to being async).
+2. No support for **conflicting names** (e.g., an `ExposedVar` named `"SoftWidgetClass"` will cause an error during node compilation).
+3. **One-frame delay** even if the soft reference is already loaded due to `LoadAsset` (TODO).
+4. **Editor Limitation**: In the editor, the node holds a **hard reference** to the `WidgetClass`.
+This is required for pin generation and proper reloading when `WidgetClass` changes.