fix: Allow nested at-rules to have nested rules

[nzakas]

Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request?

Allow nested at-rules to contain nested rules

What changes did you make? (Give an overview)

• Propagate allowNestedRules setting into at-rules so they can pass that on to their Block() calls.
• Added tests.

Related Issues

fixes #66

Is there anything you'd like reviewers to focus on?

[coveralls]

Pull Request Test Coverage Report for Build 17156414002

Details

• 6 of 6 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 98.618%

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Totals
Change from base Build 17043236960:	0.0%
Covered Lines:	11829
Relevant Lines:	11961

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💛 - Coveralls

[Copilot]

Pull Request Overview

This PR enables nested CSS rules within at-rules by propagating the allowNestedRules configuration option through the parsing chain. The fix addresses issue #66 where nested rules inside at-rules like @media were not being properly supported.

• Propagate allowNestedRules setting from Block to Atrule parsing
• Update @media at-rule handler to accept and pass through the nesting configuration
• Add comprehensive test coverage for nested at-rules with nesting selectors

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
lib/syntax/node/Block.js	Pass allowNestedRules option to Atrule parser
lib/syntax/node/Atrule.js	Accept and propagate allowNestedRules to block parsing
lib/syntax/atrule/media.js	Update media at-rule to handle allowNestedRules option
lib/__tests/parse.js	Add blank line (formatting change)
fixtures/ast/rule/nesting.json	Add test case for nested @media with nesting selector

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[fasttime]

LGTM, thanks!