Theme toggle and resizing editor option

[M-Sanjay12o52o]

This pull request introduces the following changes:

Theme Toggle:
    Added functionality to toggle between light and dark themes across the app.
    Updated styles dynamically based on the selected theme.

Editor Resize Option:
    Implemented a resizable editor feature, allowing users to adjust the editor's width within defined constraints.

Refactored Relation Grouping Logic:
    Improved the readability and functionality of the relation grouping logic by separating the groupBy and map operations.
    Resolved a build error that was previously caused by the older implementation.

[M-Sanjay12o52o]

https://prismaliser-five.vercel.app/#

here's the live link to have a look at the changes at work.