[Bug]: @typespec/http-client-js fails to compile because 'dotenv' package not found after tsp init

### Describe the bug

Try to create a project using ```tsp init``` with emitter http-client-js selected and compile, it will fail because 'dotenv' package not found.


### Reproduction

1. install the @next version compiler
2. ```tsp init``` to create a Generic REST API project with 'http-client-js' emitter
3. ```tsp compile```

Actual: compile failed as shown in the screenshot (Also the no emitter configured message is very confusing)
Expected: compile can pass with code generated properly

### Checklist

- [x] Follow our [Code of Conduct](https://github.com/microsoft/typespec/blob/main/CODE_OF_CONDUCT.md)
- [x] Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
- [x] Check that this is a concrete bug. For Q&A open a [GitHub Discussion](https://github.com/Microsoft/typespec/discussions).
- [x] The provided reproduction is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.