feat: add blur editor

[hoyaaaa]

Hi, I add blur editor

I would like to ask your opinion about my code.

i18n blurEditor

Property	Description	Default Value
applyBlurDialogMsg	Text displayed when a filter is being applied	'Blur is being applied.'
bottomNavigationBarText	Text for the bottom navigation bar item	'Blur'
back	Text for the "Back" button in the Blur Editor	'Back'
done	Text for the "Done" button in the Blur Editor	'Done'

Theme blurEditor

Property	Description	Default Value
appBarBackgroundColor	Background color of the app bar in the blur editor.	imageEditorAppBarColor (Default theme value)
appBarForegroundColor	Foreground color (text and icons) of the app bar.	Color(0xFFE1E1E1)
background	Background color of the blur editor.	imageEditorBackgroundColor (Default theme value)

icons blurEditor

Property	Description	Default Value
bottomNavBar	Icon for bottom navigation bar	Icons.blur_on

blurEditorConfigs

Property	Description	Default Value
enabled	Indicates whether the blur editor is enabled.	true
maxBlur	The maximum of blur to apply.	2.0

[hoyaaaa]

👍

[hm21]

Thank you for this fantastic new editor. I have reviewed all of your code, and it all looks great. I also love that you updated the state history import/export part, and also that your code style looks exactly the same as the other code. It feels like my code and your code are written by one person, which is amazing.

I only fixed one problem with the hero animation. But to be honest, hero animations is always a battle that they fly in a good way, especially when we work with Stack and Center widgets.

What we still have to do is to fix the unit tests. I saw that some of them failed because of an overflow issue. If I find time later, I can help to fix them, and then I will publish a new version of the editor with your code to pub.dev.
You fix the unit test faster than I can write ;) Okay, I already merged it and published it. Thanks again for this great feature.