Migrate from Homebrew formula to cask installation

Export your existing profiles. This will create a json file in your current directory.
Terminal window
```
stackit config profile export default
```
If you have multiple profiles, then execute the export command for each of them. You can find your profiles via:
Terminal window
```
stackit config profile list
stackit config profile export <profile-name>
```
Uninstall the formula.
Terminal window
```
brew uninstall stackit
```
Install the STACKIT CLI as cask.
Terminal window
```
brew install --cask stackit
```
Check if your configs are still stored.
Terminal window
```
stackit config profile list
```

In case the profiles are gone, import your profiles via:

$ stackit config profile import -c @default.json --name myProfile