Create setup functionality in `morphir-tools-launcher`

The `morphir-tools-launcher` should setup the morphir tooling, it should:

- [ ] Acquire the Morphir CLI from Maven/Artifactory

Thinks to keep in mind:

- Items should only be downloaded as needed
- We should use a `.morphir-version` file to control which version of Morphir-cli is downloaded

Start by locating the `morphir-tools-launcher` entry point and reading how it currently handles tooling setup. Define the download flow for the Morphir CLI from Maven/Artifactory, use `.morphir-version` for version selection, and ensure downloads happen only when needed. Done means the launcher can set up the requested CLI version without unnecessary downloads.

Written by the indexing model from the issue text.