Integrate generic utilities from Cyberpunk framework

[czyzby]

Cyberpunk is an opinionated Kotlin LibGDX framework that aims to be on a little higher abstraction level than KTX. Some of its utilities are generic enough to make it into KTX. In particular, we should look into:

• Screenshot utilities.
• Profiling.
• Camera utilities.
• Image and text helpers.
• Refactoring and addressing feedback (see comments below).

See ImXico/Cyberpunk#14. @ImXico

[czyzby]

@ImXico I finally got around to move some utilities from Cyberpunk to KTX. I credited you in the contributors file, I hope that's OK. Thanks again!

[czyzby]

Some feedback to consider:

• Camera: from what I can tell it would be nice to also support a version without Vector2 and simply pass targetX and targetY
• Text helpers: I wanted to use that for my floating texts but there is only a "String" version and I have a stringbuilder. Maybe there would be an option to also use stringbuilder? Second, and more important to me, it creates a Vector2 object. Since my texts are floating (=moving) I would create a vector2 object per frame. I would either need to redesign my code for this function or there should be an option to pass in a Vector2 object which will then contain the result.