add UTType conformance checks in NonTextFileView to properly preview files using QuickLook

[plbstl]

Description

This PR helps to properly preview files using QuickLook.

See #1768.

Checklist

• I read and understood the contributing guide as well as the code of conduct
• The issues this PR addresses are related to each other
• My changes generate no new warnings
• My code builds and runs on my machine
• My changes are all related to the related issue above
• I documented my code

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Cc: @bombardier200

[thecoolwinter]

Does this fix a bug or is it just for semantics? It looks like the functionality is the same w/ the switch statement

[matthijseikelenboom]

The switch statement looks cleaner imo...

[armartinez]

@thecoolwinter @matthijseikelenboom I thought the same thing but I think the difference is the call to the conforms method, since many UTTypes can conform to a base UTType, am I right @plbstl ?

[plbstl]

Yes @armartinez. Without the conformance checks, smaller images will not be shown in their proper dimensions, instead, they'll be scaled up to fit the editor view.

You can test it out in the main branch with any of the CodeEdit icons. Or something similar.