Support comment-based skipping of specific link validation (similar to `<!-- markdownlint-disable -->`)

[imhuay]

Description

When writing documentation, it is sometimes necessary to use anchors or special links that automated link validation incorrectly flags as broken.
Currently, there is no way to skip validation for a single link or a small section of content.

It would be helpful to support a comment-based mechanism, similar to markdownlint, that allows temporarily disabling link validation.

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Proposed Solution

Introduce the following comment directives:

<!-- link-validate-disable -->
[A](#A)  <!-- link-validate-disable-line -->
<!-- link-validate-enable-->

<a id='A'></a>
A

• <!-- link-validate-disable -->: disable link validation starting from this point
• <!-- link-validate-disable-line -->: disable link validation only for the current line
• <!-- link-validate-enable -->: re-enable link validation

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Benefits

• Prevents false positives and improves the documentation authoring experience
• Consistent with markdownlint usage, reducing the learning curve
• Provides fine-grained control, useful in collaborative documentation workflows

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Additional Context

markdownlint already supports a similar mechanism:

<!-- markdownlint-disable -->
<!-- markdownlint-enable -->

Bringing this capability to VSCode would make link validation more flexible and practical, especially in CI/CD pipelines where false positives can block builds.