No completion for module-level stuff

```haxe
src/Foo.hx
function hi():Void {
trace("hi");
}

src/client/Main.hx
package client;

function main() {
Fo| // or Foo.|
}

build.hxml
--class-path src
--main client.Main
# -D analyzer-optimize
# --dce full
# --interp
--js main.js
```
Works with `--interp`. Works with `class Foo + public static` Project: [test.zip](https://github.com/HaxeFoundation/haxe/files/6761899/test.zip)