[Syntax Highlighting] Add name and parameters syntax highlighting in Swift backtraces

[charles-zablit]

This PR adds function name syntax highlighting in LLDB Swift backtraces.

Motivation

In this patch, @Michael137 implemented name highlighting for methods in the C++ plugin of LLDB. This results in better readability when reading backtraces of functions with long scopes.

Please find below an example of the same feature, ported to Swift (which this patch implements):
Before:

After:

Implementation details

swiftlang/swift#81511 implements a way to override the NodePrinter, which allows to track relevant ranges. Once the correct ranges are tracked, we return a slice of the demangled string for the relevant part of the highlighting query.

The rest of the implementation is a close copy of @Michael137 's work.

Testing

The tests are implemented using the manglings.txt file in the swift repo.

Follow ups

• This patch only tracks the name and parameters of the function. In order to display the scope and qualifiers of the function, we mark them in the catch all prefix and suffix ranges. We could track those ranges as well to grey out some information that are not important, eg the fact the function is fileprivate.