Fix invalid package.json dependencies and added userSelect='none' to the Grid component of HomePage.jsx

[AggelosK004]

Description

1. Removed duplicate entries for @chakra-ui/react, @emotion/react, and @emotion/styled in package.json. The duplicate keys were invalid JSON and prevented npm install from running successfully on a fresh clone.
2. Added userSelect: 'none' to the Grid component in HomePage.jsx to prevent accidental text highlighting during interaction.

Related Issue

N/A (Fixes critical build error preventing local setup)

Motivation and Context

• Build Fix:The project contained invalid JSON (duplicate dependency keys), making it impossible for new contributors to install dependencies and run the project locally.
• UI: Clicking or dragging on the Home Page grid often resulted in ugly text selection highlighting. Disabling user select makes the component feel more like a native application.

How Has This Been Tested?

• Build Test: verified that npm install now completes successfully without errors after removing duplicate keys.
• UI Test: Ran the project locally (npm run dev) and verified that rapidly clicking the Grid component no longer triggers text selection.
• Regression: Verified that the Home Page still loads and navigates correctly.

Screenshots or GIF (In case of UI changes):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.