fix: replace scss imports with @use

[Franiac]

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior? (You can also link to an open issue here)

Issue #613

What is the new behavior?

• Uses @use instead of @import for scss references
• Fixed the docs since index.css does not exist anymore

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[CLAassistant]

All committers have signed the CLA.

[gemini-code-assist]

Summary of Changes

Hello @Franiac, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request modernizes the project's SCSS codebase by migrating from the deprecated @import rule to the contemporary @use rule. This transition improves stylesheet management by preventing global namespace pollution and enhancing maintainability. Additionally, it updates relevant documentation to reflect these changes and removes references to a no-longer-existing index.css file.

Highlights

• SCSS Module System Migration: Replaced all instances of the deprecated @import rule with the modern @use rule across various SCSS files, aligning with current Sass module system best practices.
• Documentation Update: Updated the docs/introduction/themes.md file to reflect the new @use syntax and removed references to the index.css file, which is no longer in use.
• Removed Obsolete CSS Import: Eliminated imports of index.css from theme files, as this file is no longer necessary for the project's styling.

Changelog

• docs/introduction/themes.md
  • Updated SCSS code snippets to use @use instead of @import for material.scss and icons.css.
  • Removed the @import '~@siemens/ngx-datatable/index.css'; line.
• projects/ngx-datatable/src/lib/themes/bootstrap.scss
  • Changed @import './ghost'; to @use './ghost';.
  • Changed @import './rows'; to @use './rows';.
• projects/ngx-datatable/src/lib/themes/material.scss
  • Updated SCSS code snippets in comments to use @use instead of @import for material.scss and icons.css.
  • Removed the @import '~@siemens/ngx-datatable/index.css'; line from comments.
  • Changed @import './ghost'; to @use './ghost';.
  • Changed @import './rows'; to @use './rows';.
• src/styles.scss
  • Changed @import '../projects/ngx-datatable/src/lib/themes/material'; to @use '../projects/ngx-datatable/src/lib/themes/material';.
  • Changed @import '../projects/ngx-datatable/src/lib/themes/dark'; to @use '../projects/ngx-datatable/src/lib/themes/dark';.
  • Changed @import '../projects/ngx-datatable/src/lib/themes/bootstrap'; to @use '../projects/ngx-datatable/src/lib/themes/bootstrap';.

Activity

• No human activity (comments, reviews, etc.) has been recorded on this pull request yet.

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[gemini-code-assist]

Code Review

This pull request modernizes the SCSS by replacing the @import rule with @use. While this is a good practice for SCSS files, I've noticed that @use has been incorrectly applied to plain CSS files. The @use rule is specifically for Sass files; for CSS files, the standard @import should be used. I've provided suggestions to correct this in the relevant files.