Add chapter on using profiles

[SaschaWillems]

With profiles gaining more importance as an alternative to Vulkan versioninig, we should have a chapter for them under "Using Vulkan".

[spencer-lunarg]

@christophe-lunarg interested?

[christophe-lunarg]

Is there a chapter / section specific for each layer? I was trying to find a reference with the validation layer.

I only found https://github.com/KhronosGroup/Vulkan-Guide/blob/main/chapters/development_tools.adoc which is actually out of date, the devsim layer doesn't exist anymore, replaced by the profiles layer.

[spencer-lunarg]

There is one for Validation https://github.com/KhronosGroup/Vulkan-Guide/blob/main/chapters/validation_overview.adoc

If there is already a good "how and what are profile layers" documentation, it would be simple to add a chapter here that just briefly explains what they are and then points to everywhere one needs to go for the various parts (source, SDK for built version, config options, etc)