[scss] Path resolver to include partial files support

[dyhagho]

Context

When importing partials (e.g "_mixins.scss"), it's unnecessary to explicitly include the underscore (_). Sass inherently understands and imports files with or without the underscore. Therefore, @import "mixins.scss" is a valid way to import the partial.

Why has this change been made?

Navigating to a partial file using Command + Click or Control + Click without specifying the underscore was causing the language server to be unable to find the path.

Changes

• Update toPathVariations function to consider partial files when the underscore has been omitted.
• Add a new test case to ensure accurate resolution when the underscore is omitted when import partial files.

Before

After

[dyhagho]

@microsoft-github-policy-service agree