feat(app): Add ngux extension to enable intellisense

For holding on to pointers from the host language

Normalize preview commands across editors

This fixes a bug where callbacks weren't properly cleaned-up after.

And re-use isolates when re...

This does a bit more thorough testing

Add AmazonS3 sample

And hook it up to a button instead of running at startup through the
constructor of MainView.

ThrowException should be used when there are exceptions inside
Callbacks.

And explicitly convert from C# strings to UTF8-encoded byte arrays

And add Equals and GetHashCode functions that work on the native
reference to the C# interface.

For binary compatibility

This causes configuration problems on Windows

to avoid linker problems

For easier interoperability

when that's not valid

and explicitly delete copy constructors/operators that MSVC otherwise
complains about when using...

Fix #9

Also removed a TODO, this class is actually in use.

This fixes multithreading problems