Fixes #901.

This allows piping to things like `head` without SIGPIPE errors.

It's no longer included by the remote dependencies.

The build requires it to get the commit hash.

This ensures it'll be different for each build, otherwise it would also
be the same as long as the VS Code version is the same.

You still must build on the target system though because of the native
Node modules.

- Implement the localization service.
- Use the proper build process which generates the require JSON files.
- Implement getting the locale and language configuration.

- Don't use "any" for the API type.
- Remove everything from the Coder API that can eventually be done
  through the VS Code API.
- Move the event emission to our own client to minimize patching.