Porting conformance validation tests to typescript bindings

[Fred Shih]

Hello all,

I plan on porting the conformance validation tests that are currently running on C++ to typescript. It should allow us to check that mojo behaviour is consistent across bindings.

The tl;dr is:

1. Parse the files in C++

2. Send it over to ts through mojo

3. Run tests and check if it passes/fails as expected.

Full doc here if you're interested: go/conformancets

LMK if there are any concerns, thanks!