Depend on win-guid for Windows GUID conversion

[Borewit]

• Depend on win-guid for Windows byte order GUID decoding.
• Replaced custom GUID encode/decode logic with win-guid library functions
• Renamed GUID class to AsfGuid throughout the codebase

Related to Borewit/file-type-cfbf#16

[coveralls]

coverage: 95.777% (-0.003%) from 95.78%
when pulling aa66fa8 on use-win-guid
into 81dca61 on master.

[Copilot]

Pull request overview

This PR refactors the ASF GUID handling by replacing the custom GUID implementation with the external win-guid library. The class is also renamed from GUID to AsfGuid for better consistency with other ASF-related classes.

Changes:

• Added dependency on win-guid@^0.1.3 package
• Replaced custom GUID encode/decode logic with win-guid library functions
• Renamed GUID class to AsfGuid throughout the codebase

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
package.json	Added win-guid dependency (^0.1.3)
yarn.lock	Added win-guid package resolution and checksum
lib/asf/GUID.ts	Deleted - custom GUID implementation removed
lib/asf/AsfGuid.ts	New file - refactored GUID class using win-guid library
lib/asf/AsfParser.ts	Updated imports from GUID to AsfGuid
lib/asf/AsfObject.ts	Updated all GUID references to AsfGuid
test/test-file-asf.ts	Updated test imports and references to use AsfGuid

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