Aside from the core mbed-os CMake target, a number of targets have been created so they can optionally be included by application executables that require them using `target_link_libraries()`.
Co-authored-by: Martin Kojtal <martin.kojtal@arm.com>
Co-authored-by: Rajkumar Kanagaraj <rajkumar.kanagaraj@arm.com>
```
connectivity
├── netsocket
├── lorawan
│ ├── mbed_lib.json // nanostack-interface's mbed_lib.json
│ ├── lorastack
│ ├── tests
├── nanostack
├── cellular
├── ...
```
This PR is a part of a wider \connectivity refactoring and implements the above new directory structure for \lorawan.