docs: Add links to Node.js API docs in various module replacements pages.

[connorshea]

🔗 Linked issue

N/A

📚 Description

This adds Node.js API docs links in various places where the native API is noted (and MDN in a few cases). Plus some minor, general improvements while I was going through the pages.

Also note in the md5 page that it is insecure and has been for a long time, with a link to the Wikipedia article.

[Copilot]

Pull request overview

This PR improves the “module replacements” documentation by adding direct links to relevant Node.js (and some MDN) API docs, plus minor wording improvements to better guide readers toward native alternatives.

Changes:

• Add/standardize links to Node.js API documentation across multiple replacement pages.
• Add short explanatory text for certain replacements (e.g., through, split) to clarify intent/usage.
• Add a stronger security note and reference link for MD5’s insecurity.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
docs/modules/uuidv4.md	Clarifies crypto.randomUUID availability (browser + Node.js).
docs/modules/through.md	Adds a Node.js API doc link and a brief explanation for stream.Writable.
docs/modules/strip-ansi.md	Adds a Node.js API doc link and formats the API name as code.
docs/modules/split.md	Adds Node.js API doc link + explanatory text; updates example imports.
docs/modules/object-hash.md	Links SubtleCrypto.digest to MDN docs.
docs/modules/md5.md	Adds explicit insecurity warning + Wikipedia link; links Node crypto docs.
docs/modules/inherits.md	Adds MDN link for extends.
docs/modules/get-stream.md	Links Array.fromAsync to MDN and clarifies Node version note.
docs/modules/fs-extra.md	Links fs and fs/promises to Node.js API docs.
docs/modules/builtin-modules.md	Formats and links builtinModules to Node.js API docs.
docs/modules/buffer-equals.md	Links Buffer#equals to Node.js API docs and clarifies version text.
docs/modules/buffer-equal.md	Links Buffer#equals to Node.js API docs and clarifies version text.
docs/modules/buf-compare.md	Links Buffer.compare to Node.js API docs.

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