Separate explicit methods ExistsFile() and ExistsDirectory() Implemented

[JoshuaStone9]

Here I have completed the issue of folder.Exists() doesn't check for directory existence, but only for files. and allowed for a readonly struct to be made for fast results and kept the methods simple.

This is my first contribution, hope this good work :)

[Copilot]

Pull Request Overview

This PR adds a new AbsolutePath struct inside the PathStrings static class in TruePath/PathStrings.cs. This appears to be an attempt to create a duplicate or alternative implementation of the existing AbsolutePath type.

Key Changes:

• Added a new AbsolutePath readonly struct with a Value property and three existence-checking methods (Exists(), ExistsFile(), ExistsDirectory())

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[Copilot]

The Value property has no setter and no constructor to initialize it, which means Value will always be null. This will cause NullReferenceException when any of the Exists methods are called. A constructor is needed to initialize this property.

Suggested change

	public AbsolutePath(string value)
	{
	Value = value;
	}

[Copilot]

The Exists() method duplicates functionality that already exists as an extension method on the existing AbsolutePath type in TruePath.SystemIo/PathIo.cs (line 295). The existing implementation only checks for file existence via File.Exists(), while this new implementation checks both files and directories. If the intent is to add directory checking, this should be done by modifying the existing extension method rather than creating a new type.

Suggested change

	public bool Exists() =>
	File.Exists(Value) || Directory.Exists(Value);