Link built-in attribute implementations in extensibility interface docs

[Copilot]

The interface documentation pages under Custom Attributes listed NUnit's built-in implementations as plain text, missing an opportunity to direct readers to the attribute documentation they'd likely want as implementation examples.

Changes

• Replaced plain-text attribute names with markdown links to their respective docs pages across all 8 interface pages:
  • IApplyToContext-Interface.md — 6 attributes linked
  • IApplyToTest-Interface.md — 10 attributes linked (CombiningStrategyAttribute has no dedicated page; left as plain text)
  • ICommandWrapper-Interface.md — 3 attributes linked
  • IFixtureBuilder-Interface.md — 3 attributes linked
  • ITestBuilder-Interface.md — 6 attributes linked (derived classes of CombiningStrategyAttribute linked individually; parent left as plain text)
  • ISimpleTestBuilder-Interface.md — 1 attribute linked
  • IParameterDataSource-Interface.md — 4 attributes linked
  • IImplyFixture-Interface.md — 4 attributes linked

All links use relative paths (e.g. ../writing-tests/attributes/timeout.md) consistent with the existing doc structure.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Update Custom Attributes interfaces pages to link to implementations</issue_title>
<issue_description>Each of the interfaces defined as an extensibility endpoint has a documentation page listed under https://docs.nunit.org/articles/nunit/extending-nunit/Custom-Attributes.html

Each of those pages in turn contains a list of built-in implementations within NUnit. Each of these are listed as a static list with the name of the attribute as text. Someone reviewing the page may be looking for examples of how to implement the interface. It may help them in their quest if we update the documentation to link to documentation about the attribute itself. </issue_description>

<agent_instructions>Each of the interfaces defined as an extensibility endpoint has a documentation page listed under https://docs.nunit.org/articles/nunit/extending-nunit/Custom-Attributes.html

Each of those pages in turn contains a list of built-in implementations within NUnit near the bottom. Each list is static text with the name of an NUnit attribute Please update those to link to documentation about the attribute itself.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Update Custom Attributes interfaces pages to link to implementations #1133

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[stevenaw]

Thanks Copilot

[OsirisTerje]

Nice work!

[SeanKilleen]

Sweet! Great use of Copilot @stevenaw!