Time permitting, I'll come back through and clean up the submissions for readability. :)
To run each executable, pass the local path of input.txt.
To simplify debugging, which was initially done in Visual Studio 2022 on Windows 10, each project's launchSettings.json is configured to go looking for this input at %USERPROFILE%\Desktop\AdventOfCode2023Inputs\DayXYProblemZ\input.txt