fix(vscode): support multiline <style> attributes for correct SASS highlighting

[Rohit1415]

Changes

• Fixes incorrect syntax highlighting when the lang="sass" attribute is placed on a new line within a <style> tag.
• Updates the tags-lang grammar lookahead patterns in astro.tmLanguage.src.yaml to support multi-line attribute parsing using [\s\S]*?.
• Regenerates the corresponding astro.tmLanguage.json to ensure consistent highlighting behavior.
• Ensures SASS blocks render correctly in the VS Code extension regardless of <style> formatting.

Before

SASS content inside a multi-line <style> tag was highlighted as CSS instead of SASS:

<style
  lang="sass"
>
  .bar
    color: var(--foo)
</style>

After

The same SASS block is now parsed and highlighted correctly as SASS, matching the behavior when lang="sass" is on a single line.

Testing

• Updated the grammar and rebuilt the VS Code extension via pnpm -C packages/language-tools/vscode build.
• Launched the Extension Development Host and manually verified syntax highlighting using the provided reproduction case.
• Confirmed that SASS content and closing </style> tags are now highlighted consistently in both single-line and multi-line <style lang="sass"> formats.

Docs

No documentation updates required. This change affects syntax highlighting behavior only and does not introduce user-facing configuration or API changes.

[changeset-bot]

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Latest commit: 8227b42

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