Enforces tab indentation in codebase

[firestar300]

Issue

Cette PR répond à l'issue #431.

Description

Updates ESLint and Stylelint configuration to enforce tab indentation for improved code readability and consistency.
Also, applies tab indentation to existing JavaScript et SCSS files.

Summary by Sourcery

Enforce tab-based indentation throughout the codebase by updating linting configurations and reformatting all existing JavaScript and SCSS files to use tabs for consistency.

Enhancements:

• Add ESLint and Stylelint rules to enforce tab indentation.
• Reformat all existing JS and SCSS files to use tabs instead of spaces for consistent indentation.

[sourcery-ai]

Reviewer's Guide

This PR enforces tab‐based indentation for consistency by updating lint configurations and reformatting the entire codebase accordingly.

File-Level Changes

Change	Details	Files
Updated linting rules to enforce tabs	ESLint indent rule set to tabs Stylelint indentation rule set to tabs	.eslintrc .stylelintrc
Reformatted code indentation across JS and SCSS files	Replaced space indents with tabs throughout existing files Preserved original code structure while normalizing indent style	src/js/**/*.js src/scss/**/*.scss
Corrected import path for Poppins font mixins	Adjusted Poppins mixin import to use relative node_modules path	src/scss/03-base/_fonts.scss

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[sourcery-ai]

Hey @firestar300 - I've reviewed your changes - here's some feedback:

• Consider isolating all whitespace-only tabbing changes into a dedicated commit to reduce noise and make reviewing the actual functional updates easier.
• Double-check the updated relative import path to @fontsource/poppins in _fonts.scss after the indentation changes to ensure it still resolves correctly.

Here's what I looked at during the review

• 🟡 General issues: 4 issues found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Documentation: all looks good

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