fix: detect PHPUnit #[Test] attribute with fully-qualified name

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Problem

When a PHPUnit test method is annotated with the fully-qualified attribute form:

#[\PHPUnit\Framework\Attributes\Test]
public function it_does_something(): void { ... }

Zed does not show the ▷ gutter play button, so the test cannot be run from the editor. Only the short imported form #[Test] triggers the runnable.

Root cause

The runnables.scm query for the #[Test] case only matches a simple name node inside the attribute:

(attribute (name) @_attribute)
(#eq? @_attribute "Test")

For a fully-qualified attribute, the tree-sitter PHP grammar produces a qualified_name node instead of a bare name. According to the grammar definition, qualified_name has the structure:

(qualified_name
  prefix: (... \PHPUnit\Framework\Attributes\ ...)
  (name) "Test"   <-- direct child, NOT inside the prefix
)

The namespace segments (PHPUnit, Framework, Attributes) are nested inside the prefix field, while the class name (Test) is a direct name child of qualified_name. The existing query never reaches this node.

Fix

Add an alternative branch (qualified_name (name) @_attribute) inside the attribute match so both the short and fully-qualified forms are handled:

(attribute
    [
        (name) @_attribute
        (qualified_name (name) @_attribute)
    ]
)
(#eq? @_attribute "Test")

This covers:

• #[Test] — short form (existing, unchanged)
• #[PHPUnit\Framework\Attributes\Test] — relative qualified form
• #[\PHPUnit\Framework\Attributes\Test] — fully-qualified form (global namespace prefix)

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