#67 Have a way to get the configuration folder

When installing from any source other than git it may be usefull to have a way to show the configuration folder. Since prismedia use a local config and not a "well known path" like `%AppData%` on Windows or `.config/prismedia` on linux. I vote to change `prismedia-init` so it show the path with maybe a little text like : "Sample configuration ready at : XXX". Maybe also add a little option like `prismedia-init --show` or `--config` or wathever (maybe just restart the command and let it do nothing more than showing the path if config files are already at their good place). For example, installing with `pipx` make the config folder here: `~/.local/pipx/venvs/prismedia/lib/python3.10/site-packages/prismedia/config/`… not friendly/easy to discover and it may even move place if I belive the `python3.10` in the middle 😅.