Use NAPI instead of V8

[maierfelix]

This would allow users to install nvk without the need to download the SDK and compile the bindings. The need of installing Lunar's Vulkan runtime could also be removed by just shipping the runtime files with the binaries.

Edit: this branch contains all necessary conversions, nearly ready to be merged

[maierfelix]

@Reon90 NAPI conversions are landed into master with version 0.2.5 and commit c4d484d, could you test your RT project if it's still working?

Just reinstall nvk in your project with:

npm uninstall nvk
npm install nvk

[Reon90]

@maierfelix yes it's working.

[maierfelix]

great, thank you!