fix: linker handles :not() pseudo-class selectors and uses correct SelectorFlags

[Brooooooklyn]

Replace the linker's custom parse_selector/parse_single_selector with the
pipeline's parse_selector_to_r3_selector which correctly handles :not()
pseudo-class selectors, SelectorFlags.CLASS (8) instead of "class" string,
and proper ordering of element → attributes → classes → :not() blocks.

• Close Linker drops :not() pseudo-class selectors - negation is lost, selectors match incorrectly #69

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com

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Note

Medium Risk
Touches selector codegen used in ɵɵdefineDirective/ɵɵdefineComponent output, so incorrect serialization could break directive/component matching at runtime, but the change is narrowly scoped and well-covered by new tests.

Overview
Updates the linker’s selector serialization to delegate to the shared pipeline::selector::parse_selector_to_r3_selector, replacing the bespoke parsing logic.

This changes generated selector arrays to use numeric SelectorFlags (e.g. class as 8) and adds correct support for :not(...) pseudo-class selectors (including multiple :not() blocks and comma-separated selector lists), with expanded unit tests covering these cases.

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[Brooooooklyn]

• fix: linker handles :not() pseudo-class selectors and uses correct SelectorFlags #80 👈 (View in Graphite)
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