feat!: release version 11.0.0 with breaking changes

[EchoEllet]

Description

Prepare version 11.0.0 and introduce breaking changes, and cleanup with no new features.

To try the new version before it is released:

dependency_overrides:
  flutter_quill:
    git:
      url: https://github.com/singerdmx/flutter-quill.git
      ref: release/v11
  flutter_quill_extensions:
    git:
      url: https://github.com/singerdmx/flutter-quill.git
      ref: release/v11
      path: flutter_quill_extensions

See the migration guide to migrate from 10.0.0 to 11.0.0.

Related Issues

• Related Breaking changes of version 11.0.0 #2260
• Fix Update the exposed libraries #2321
• Fix Remove the QuillToolbarProvider, QuillEditorProvider and related classes and members #2301
• Fix The option to disable the Rich clipboard feature or customize the clipboard behavior #2320
• Fix Localization issue with Image picker menu popup #2335
• Fix Improve quality and format of CHANGELOG.md #2211
• Fix Simplify the example #2249
• Partial Fix Add paste options (bool plainTextOnly and a callback to view/modify a delta prior to pasting) #2350
• Related Breaking changes for version 11 #2097

Type of Change

• ✨ New feature: Adds new functionality without breaking existing features.
• 🛠️ Bug fix: Resolves an issue without altering current behavior.
• 🧹 Code refactor: Code restructuring that does not affect behavior.
• ❌ Breaking change: Alters existing functionality and requires updates.
• 🧪 Tests: Adds new tests or modifies existing tests.
• 📝 Documentation: Updates or additions to documentation.
• 🗑️ Chore: Routine tasks, or maintenance.
• ✅ Build configuration change: Changes to build or deploy processes.

[EchoEllet]

It's time to review and merge this PR into master, but not yet publish it as stable. I want more user feedback and I'm considering changes like disabling rich text paste by default (can be enabled with one line, see #2350) and reintroducing spell check as experimental (removed in v11).

To summary our discussion:

QuillToolbar class no longer exists

The QuillToolbar was used to create a custom toolbar while being able to use the buttons of flutter_quill, now it's no longer required and users can use the buttons directly, it has been removed. The docs has been updated to clarify this.

Quill Toolbar no longer works

It work as before, no changes were introduced, the only minor breaking change that introduced is not requesting the keyboard focus by default, and that has been already documented before, the migration guide has been updated to provide code snippets to revert on both custom and simple toolbar.

I used the original class in my app to create a custom toolbar specifically for desktop.
I do not use the QuillSimpleToolbar as it is not suitable for my desktop application.
The loss of the base implementation means I have to resurrect the old flutter quill code and create my own class.
This is a major inconvenience!

It has been restored to make the migration smoother and it supports the custom button embed too (integrate with flutter_quill_extensions's buttons).

The pre-release has been published again on pub.dev

[EchoEllet]

This PR focuses on breaking changes and prioritizes issues needed in a major release.

Other changes will be addressed separately before publishing the stable release of v11.

Most changes are minor, primarily removals (e.g., CHANGELOG.md files, examples). It's not final though I don't expect new bugs.

Two minor questions:

• If QuillEditorConfig.disableClipboard should be moved to QuillClipboardConfig which is used within the controller's config.
• If setState should be always called to update the _dirty state or only if it's false, I reverted this change (made in 8.0.0) since I don't expect any performance difference and it can cause unexpected bugs.