Add parser for swift-show-dependencies.deplock

[keshav-space]

Reference: aboutcode-org/scancode.io#1278

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[AyanSinhaMahapatra]

@keshav-space LGTM! Thanks++
This works nicely for package resolution and dependency graph creation on the SCIO side. I have a couple nits for your consideration, this is ready to merge afterwards.
Also merge from latest to resolve conflicts.

[AyanSinhaMahapatra]

One more question, I assume we cannot parse Package.swift files like this one here: https://github.com/swift-cloud/VercelUI/blob/main/Package.swift right, becuase this is in swift and not parseable in python easily?

[keshav-space]

One more question, I assume we cannot parse Package.swift files like this one here: https://github.com/swift-cloud/VercelUI/blob/main/Package.swift right, becuase this is in swift and not parseable in python easily?

@AyanSinhaMahapatra We are not directly parsing the Package.swift file, but we parse the Package.swift.deplock, which is a JSON dump of Package.swift. In the future, we may add support for natively parsing the Package.swift file, and we can use Tree-Sitter (an optional dependency) for creating and parsing the Swift AST.

[AyanSinhaMahapatra]

Thanks @keshav-space! Merging!