Support PSX .chd

[gamelamp]

Disclamer
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Is your feature request related to a problem? Please describe.
Well, kind of. the PSX core you're using supports .chd rom files, yet I am unable to actually open and PSX .chd file with the latest Lemuroid version

Describe the solution you'd like
Clear support for .chd file format for PSX

Describe alternatives you've considered
Using a standalone PSX emulator, which I really don't want to do

Additional context
Nothing :)

[mimvahedi]

Formats like iso and chd are generic, so you need to move them to a folder named psx to be recognized as ps1 games.