MrmGetFilePathFromName violates its document

[Berrysoft]

Describe the bug

The document and comments of this method indicates that it will always succeed even if the app doesn't have a PRI file.

WindowsAppSDK/dev/MRTCore/mrt/Core/src/MRM.cpp

Lines 964 to 967 in 53d32b0

	// A file path is always returned even if none of the files under the above mentioned searching
	// criteria exists. In that case, we will return filename (if provided) or resources.pri (if name not
	// provided) under module file path. The reason is that we don't want to fail the creation of
	// ResourceManager even if an app doesn't have PRI file.

However, it returns ERROR_FILE_NOT_FOUND:

WindowsAppSDK/dev/MRTCore/mrt/Core/src/MRM.cpp

Line 1085 in 53d32b0

return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);

I have created #5828 to fix it, but no one takes care of it.

Steps to reproduce the bug

Create a WinUI3 program without PRI files. I know it's a little hard, but see:

#5814

Alovchin91/winui3-rs#5

Expected behavior

The behavior of the method should match its document.

Screenshots

No response

NuGet package version

Windows App SDK 1.8.2: 1.8.251003001

Packaging type

Unpackaged

Windows version

Windows 11 version 24H2 (26100, June 2025 Update)

IDE

Visual Studio 2022

Additional context

No response

[DarranRowe]

Dupe of #5814 ?