Set the following compiler defaults:
```
"target": "es6",
"module": "commonjs",
"moduleResolution": "node",
"sourceMap": true,
```
Which allows us to not even include a tsconfig.json file. If one is
present, `ts-node` will use its options, but the above settings will
override any settings in a local tsconfig.json file. This means if you
want full control over the target, you'll need to go back to the raw
tsc workflow where you explicitly build ahead of time.
We retain a few tests on the RunBuild plan, with `typescript` set to
false in the runtime options, but for the general case, we remove the
build steps and custom entry points for our programs.
1. Various idiomatic Go and TypeScript fixes
2. Add an integration test that end-to-end roundtrips dependency
information for a simple Pulumi program
3. Add an additional test assert that tests that dependency information
comes from the language host as expected
