MooseDocs code snippet file paths must be prefaced by folder to avoid ambiguity

[GiudGiud]

Bug Description

It is very common to add "Function" or "Scaled" or "Parsed" in front of an object name to indicate the functionality has been augmented in a new object in an applicaiton.
However if the Moose documentation has a snippet like this:

!listing Object.C

this causes an ambiguity as both XYZObject.C and Object.C match the regex

Steps to Reproduce

Have two objects, one of them being named after the other with a prefix
Have a snippet / listing using the name of the other without the folder

Impact

Breaks doco on the application

[Optional] Diagnostics

No response