feat: support Uint8Array source input and update docs

[weponary]

Summary

This PR adds support for [Uint8Array] as a valid input type for the extractor source.

Previously, extraction accepted only:

• file path string
• Buffer

Now it also accepts:

• Uint8Array

What Changed

• Updated source type handling in the extractor to detect [Uint8Array].
• Converts [Uint8Array] to Buffer while preserving byte offset and byte length.
• Updated JSDoc/type annotation to include [Uint8Array].
• Added a regression test to verify extraction works when source is provided as [Uint8Array].

Validation

• Ran test suite successfully.
• Existing behavior for string path and Buffer inputs remains unchanged.
• Added test coverage for Uint8Array input path.