Lexicon v0.11.0-beta.3.1

Pre-release (beta) — for beta testers only. Expect changes and possible rough edges; Please report issues on GitHub or Discord.
Refactor process termination in LanguageTool integration

This commit simplifies the process termination logic in the LanguageTool backend by removing the Windows-specific taskkill command and replacing it with a more general approach using process termination methods. Additionally, new tests have been added to ensure that the termination logic behaves correctly for both running and already exited processes, enhancing reliability and maintainability.