fix(Vulkan): include integrated GPU memory

[giladgd]

Description of change

• fix(Vulkan): include integrated GPU memory - adapt to a change in llama.cpp
• fix(Vulkan): deduplicate the same device coming from different drivers
• fix: adapt Llama chat wrappers to breaking llama.cpp changes
• fix: internal log level
• docs(Vulkan): recommend installing LLVM on Windows

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run format to apply eslint formatting
• npm run test passes with this change
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits and pull request title follow conventions explained in pull request guidelines (PRs that do not follow this convention will not be merged)

[ido-pluto]

LGTM