Fix Font Awesome 7.x SCSS import path breaking change

[Copilot]

Description

Font Awesome 7.x restructured SCSS files, removing individual partials and consolidating imports into a single entry point. The build failed because the theme still referenced the old fontawesome.scss path.

Changes

• Updated SCSS import from fontawesome.scss to font-awesome.scss in theme assets

# Before
@import "../../node_modules/@fortawesome/fontawesome-free/scss/fontawesome";

# After  
@import "../../node_modules/@fortawesome/fontawesome-free/scss/font-awesome";

Schedule

Can be merged upon approval.

Type of change

• Admin / Chore

Checklist:

• My code follows the style guidelines of this project, by meeting any linting requirements
• I have the right to publish this content
• All images have used in markdown are referenced with a description, as well as a caption (The format would be ![Description](path/to/image.jpg "Caption")).

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