feat: support adding words to dictionary with a callback

[andrew-bekhiet-solid]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @andrew-bekhiet-solid, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the spell-checking capabilities by allowing users to maintain a personal dictionary. This feature enables the system to learn and ignore specific words, such as proper nouns or domain-specific terminology, thereby improving the precision and user experience of the spell checker. The changes involve new service implementations, controller updates, and UI adjustments to support this functionality.

Highlights

• Custom Dictionary Support: Introduced the ability to add words to a custom dictionary directly from the mistake popup, enhancing spell-checking accuracy and reducing false positives.
• In-Memory Dictionary Service: Implemented a new InMemoryDictionaryLanguageCheckService that filters spell-check suggestions based on a user-defined, dynamic dictionary.
• Text Re-evaluation: Added a recheckText method to LanguageToolController to explicitly re-evaluate the text for mistakes, useful after dictionary updates or configuration changes.
• Mistake Popup Enhancements: Improved the LanguageToolMistakePopup by adding an 'add to dictionary' action and refining its visual layout with adjusted icon sizes and padding.
• Example Application Update: The example application now includes a UI for managing the in-memory dictionary, demonstrating the new functionality.

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[gemini-code-assist]

Code Review

This pull request introduces a great new feature for adding words to a custom dictionary, which will be very useful. The implementation is solid, with a new InMemoryDictionaryLanguageCheckService and UI hooks in the mistake popup. I've provided a few suggestions to improve robustness and flexibility, mainly around error handling for the dictionary callback and making the new service more composable. The example app has also been updated well to showcase the feature, though I have a minor suggestion to prevent potential UI overflows.

[illia-romanenko]

Thanks @andrew-bekhiet-solid - could you please also add a screenshot? I'm assuming that should be some UI button with it.

[andrew-bekhiet-solid]

Sure here they are:

Add to dictionary button hovered	Close button hovered