New changes and improvemenets

[EchoEllet]

I should have made more changes before I sent this pull request but I couldn't help myself

but at least it's not a lot of changes

Improvements:

• Delete old todo and unneeded
• Improve performance by using const + dispose all the text editing controllers in dispose()
• use (Attribute.margin, Attribute.alignment) in flutter_quill_extensions
• Remove unused code
• Using a better default value for linkRegExp for inserting the images
• Update the TextFields to automatically send the form when press enter in the last field
• Update the text input types of the text fields, suggestions, and more
• Fix some MediaButton bugs and format code
• Format and organize some of the source code, even in the tests, some of them done in dart format .
• Fix bug #1432
• Fix bug #1434
• Fix bug #1435 by sending pull request to fluent_ui maintainers, in case they decided to reject the changes, then you need to make sure to:

      localizationsDelegates: const [
        DefaultCupertinoLocalizations.delegate,
        DefaultMaterialLocalizations.delegate,
        DefaultWidgetsLocalizations.delegate,
        FluentLocalizations.delegate,
      ],

when using FluentApp or any custom widget app

• Add isMacOS() function in the platform checker file

Features:

1. Add MediaButton for picking the images only since the video one is not ready
2. Thanks to feature request #1431 by milindgoel I was able to add a new feature which allows customizing the text selection in quill editor which is useful for custom theme design system for custom app widget like FluentApp

[singerdmx]

Is this PR ready to merge or you need to make more changes

[EchoEllet]

Is this PR ready to merge or you need to make more changes

If you merge this then I will prepare for the next pull request

[singerdmx]

Ok

[singerdmx]

Can you cherry pick the other change related to toolbar in your next PR

[singerdmx]

#1438