objdiff.json parsing fails on Windows with absolute paths

[Kelebek1]

In objdiff.json I have a path defined as "target_path": "D:/Games/BlackAndWhite/openblack/..., but when opened in objdiff it fails to build with Error: Target path 'D:Games\BlackAndWhite\openblack\. Objdiff automatically converts the forward slashes to backslashes (Windows supports forward slash paths so this isn't necessary), but misses the one on the root drive, causing the path to be invalid.

To repro, clone https://github.com/openblack/bw1-decomp/tree/main on Windows, run ./configure_objdiff.py and then load the project in objdiff from the cmake-build-presets/objdiff folder.