Proposal:Improvements to ```MenuFlyout```, ```CommandBarFlyout```, and ```TextCommandBarFlyout```

### Title

Improvements to ```MenuFlyout```, ```CommandBarFlyout```, and ```TextCommandBarFlyout```

##### ----------------------------------------------

```MenuFlyout``` 、 ```CommandBarFlyout``` 和 ```TextCommandBarFlyout``` 的改进

### Summary

在最新的基于 WinUI 3 样式的记事本应用中，我们发现了记事本应用使用的右键菜单是用 ```MenuFlyout``` 构建的模仿 ```CommandBarFlyout```/```TextCommandBarFlyout``` 控件，复原度将近 95%。这说明了 ```CommandBarFlyout```/```TextCommandBarFlyout``` 完全可以基于 ```MenuFlyout``` 实现，而不是单独构建一个复杂的 ```CommandBarFlyout```/```TextCommandBarFlyout```。所以我在这边提议，希望 WinUI 团队能重新审视 ```CommandBarFlyout```/```TextCommandBarFlyout``` 控件，能在目前已有的 ```MenuFlyout``` 作出改进，而不是重新单独构建一个 ```CommandBarFlyout```/```TextCommandBarFlyout``` 控件。

##### --------------------------------------------------

In the latest WinUI 3-style notepad app, we found that the notepad app uses a ```CommandBarFlyout```/```TextCommandBarFlyout```-like control built with ```MenuFlyout``` with nearly 95% resiliency. This shows that ```CommandBarFlyout```/```TextCommandBarFlyout``` can be implemented entirely on MenuFlyout, rather than building a complex ```CommandBarFlyout```/```TextCommandBarFlyout``` separately. So I propose here that the WinUI team revisit the ```CommandBarFlyout```/```TextCommandBarFlyout``` controls and improve on the existing MenuFlyout, rather than rebuilding a separate ```CommandBarFlyout```/```TextCommandBarFlyout``` control.

--------------------------------------------------

使用 MenuFlyout 而不是目前的 CommandBarFlyout 控件的好处

```MenuFlyout``` 相比于 ```CommandBarFlyout``` 更轻量化，加载速度更快。
```CommandBarFlyout``` 的主题色存在问题，这一问题存在于所有的 WinUI 版本，到现在都没有修复。
```MenuFlyout``` 就可以实现 ```CommandBarFlyout``` 的功能，为什么要使用复杂的目前 ```CommandBarFlyout``` 控件?
```CommandBarFlyout``` 不支持自定义 ```CommandBarFlyoutPresenterStyle```，```MenuFlyout``` 支持 ```MenuFlyoutPresenterStyle```。
```MenuFlyout``` 有弹出动画，```CommandBarFlyout```/```TextCommandBarFlyout``` 没有弹出动画。

##### --------------------------------------------------

```MenuFlyout``` is lighter and loads faster than ```CommandBarFlyout```.
There is an issue with the theme color of ```CommandBarFlyout```, which exists in all WinUI versions and has not been fixed to date.
```MenuFlyout``` can implement the functionality of ```CommandBarFlyout```, so why use the complex current ```CommandBarFlyout``` control?
```CommandBarFlyout``` does not support custom ```CommandBarFlyoutPresenterStyle```, and ```MenuFlyout``` supports ```MenuFlyoutPresenterStyle```.
```MenuFlyout``` has a pop-up animation, while ```CommandBarFlyout```/```TextCommandBarFlyout``` does not have a pop-up animation.

--------------------------------------------------

记事本的模仿 ```CommandBarFlyout```/```TextCommandBarFlyout``` 的 ```MenuFlyout``` 实图

##### --------------------------------------------------

Notepad imitation of ```CommandBarFlyout```/```TextCommandBarFlyout```'s ```MenuFlyout``` real image

### Rationale

None

### Scope

| Capability | Priority |
| :---------- | :------- |
| This proposal will allow developers to accomplish W | Must |
| This proposal will allow end users to accomplish X | Should |
| This proposal will allow developers to accomplish Y | Could |
| This proposal will allow end users to accomplish Z | Won't |

### Important Notes

_No response_

### Open Questions

None

No implementation files, tests, or concrete entry points are identified. Start by reviewing the existing MenuFlyout, CommandBarFlyout, and TextCommandBarFlyout implementations and their documented behavior; a useful completion criterion would need to define which control changes are required and how compatibility and visual behavior will be validated.

Written by the indexing model from the issue text.