Add Cookie Management Feature for Visitor Privacy Preferences

[Chelakhovl]

This PR implements the cookie management functionality, enabling visitors to manage their cookie preferences in compliance with the acceptance criteria outlined below:

Key Features:
Cookie Banner Visibility:

A cookie banner titled "Використання файлів 'Cookies'" (Use of Cookies) is displayed at the bottom of the screen for first-time visitors.
Ensures visibility and accessibility for visitors.
Cookie Information:

The banner provides a brief explanation of the types of cookies used on the site:
Necessary
Statistic
Preferences
Marketing
Includes clear descriptions of their purposes.
Action Buttons:

"Дозволити всі" (Allow All): Enables all types of cookies.
"Налаштувати" (Configure): Opens a detailed settings modal for cookie management.
Detailed Cookie Settings Modal:

Includes:
A list of cookie categories (Necessary, Statistic, Preferences, Marketing) with descriptions.
Checkboxes for enabling/disabling specific cookie categories.

Two action buttons:
"Дозволити обрані" (Allow Selected): Saves selected preferences.
"Назад" (Back): Returns to the main banner.
Responsiveness:

The banner and modal adapt to various screen sizes and resolutions to ensure usability on both desktop and mobile devices.
Cookie Preferences Storage:

Cookie preferences are stored locally and applied on future visits unless the browser cache is cleared.
Default State:

The "Necessary" category is pre-checked and disabled, as these cookies are essential for the site's functionality.
Implementation Details:
Component - CookieMod:
Main component handling the cookie banner and modal logic.

State Management:
Local state manages modal visibility and selected preferences.
Preferences are stored using the browser's localStorage via react-cookie.

Styling:
Fully responsive styling with appropriate adjustments for screen sizes (375px, 768px, etc.).

Testing:
Unit test for:
Button visibility and functionality.
All tests pass successfully.