Use tree to display feature view and feature when selecting features

We can optimize the feature selection to display all the features in tree component.

Look for the feature selection UI component in the Vue codebase, likely in a directory like src/components or src/views. Identify where features are currently displayed and replace that with a tree component. Check if there are existing tree components or libraries used in the project. Verify the change by running the application and testing the feature selection interface.

索引モデルが issue の本文から書いたものです。