[antonkesy]

Fixes typos around the code base.

I kinda overdone it and split them into groups (if some typos occurred multiple times ...)
Might be a good idea to squash that PR before merging ...

These are only comment/doc changes except:

• generator/VkXMLParser.cpp -> log string output changes
• generator/VulkanHppGenerator.cpp ->

case TypeCategory::Unknown : return "unknown";

These could actually break something, if these exact strings are matched (but I really hope this isn't the case ...)

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