If I put in `.cargo/config.toml` at the workspace root:
```
[build]
target = "thumbv8m.main-none-eabihf"
```
The CLI app will also be built using that target, even though it is not part of the same workspace technically.

I do not know what the CLI-app will be run on so I would like to set it to
```
[build]
target = "host"
```
or whatever