Final fixes before pub.dev release

[RZEROSTERN]

This pull request introduces several improvements and refinements to the editorjs_flutter package and its demo, focusing on documentation, code quality, and usability. Highlights include enhanced documentation, stricter linting, dependency updates, and minor code cleanups for clarity and maintainability.

Documentation and Public API:

• Expanded the README.md with updated usage instructions, clearer project status, and badges for pub, CI, and code coverage. Also clarified API stability and added an example for loading JSON directly into the editor. [1] [2] [3]

Project Metadata and Dependencies:

• Updated pubspec.yaml with new homepage, repository, and issue tracker URLs, and added flutter_lints as a dev dependency for improved code quality. [1] [2]
• Updated the example dependency version in documentation to ^0.5.0.

Linting and Code Quality:

• Enabled strict linting rules in both the main package and demo app by including flutter_lints and specifying additional rules in analysis_options.yaml. [1] [2]

Demo and Testing Improvements:

• Simplified the demo app's widget test to a basic smoke test and removed boilerplate comments for clarity.
• Refactored asset loading in the demo app for readability by storing the bundle in a variable.

Code Consistency and Minor Fixes:

• Added missing const constructors in toolbar block creation for better performance and consistency in editorjs_toolbar.dart. [1] [2]
• Fixed unnecessary use of this. in editorjs_view.dart for cleaner code.
• Added missing const in a test helper for custom block registration.

[Copilot]

Pull request overview

This PR prepares editorjs_flutter for a pub.dev release by tightening project metadata/linting, refreshing documentation, and applying small code/test cleanups across the package and demo.

Changes:

• Updated package metadata + added flutter_lints with shared analysis_options.yaml for stricter linting.
• Refined docs (README badges/usage) and added an MIT LICENSE.
• Minor code/test cleanups (const usage, removing unnecessary this., simpler demo smoke test, demo asset loading refactor).

Reviewed changes

Copilot reviewed 9 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/unit/editor_controller_test.dart	Uses const for the custom mapper in the registry test helper.
pubspec.yaml	Updates homepage/repo links and adds flutter_lints dev dependency; removes boilerplate.
pubspec.lock	Lockfile updated to reflect dependency graph changes.
lib/src/presentation/widgets/editorjs_view.dart	Removes unnecessary this. qualifiers when accessing config.
lib/src/presentation/widgets/editorjs_toolbar.dart	Adds const to some block creations in toolbar actions.
demo/test/widget_test.dart	Replaces default counter test with a minimal smoke test.
demo/lib/main.dart	Refactors asset loading by reusing the AssetBundle instance.
demo/analysis_options.yaml	Adds lint include for demo (flutter_lints).
coverage/lcov.info	Updates committed coverage output.
analysis_options.yaml	Adds repo-wide lint configuration based on flutter_lints.
README.md	Expands/updates documentation, badges, and adds fromJson example.
LICENSE	Adds MIT license text.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 9 out of 12 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.