Migrating the code base to GetX statemanagement

[BrawlerXull]

Description

Used GetX architecture in the new version of the application

Fixes #(issue_no)

348

Screenshots

Checklist

• [ ] Tests have been added or updated to cover the changes
• [ ] Documentation has been updated to reflect the changes
• [X] Code follows the established coding style guidelines
• [ ] All tests are passing

[Pavel401]

@BrawlerXull fix the conflicts

[Pavel401]

• [ ] Auto scroll should only toggle when the max extend screen has more tasks
• [ ] Add task dialog -> priority is not updating when changed
• [ ] Add tags not working
• [ ] [log] FormatException: Taskwarrior documentation on JSON format indicates your task tag should not contain spaces. (at character 5) task 1 , then tried to add a new task

I reviewed the changes and it seems that the "add task" feature is broken, causing all the existing features to malfunction. As a result, I couldn't test all the features.