Default configuration content and creation #59
Description
Following up from #57
When no config exists, the daemon creates one at ~/.config/reticulum/config.toml. Right now it's minimal: just a TCP server on 127.0.0.1:4242.
Should it bind to 0.0.0.0 instead for easier out-of-the-box networking? Or is localhost-only the safer default?
Would it be useful to include commented-out examples like Python Reticulum's --exampleconfig does? The tradeoff is a much longer default file versus better discoverability of features.
Should we add a --init or --example-config flag to generate a verbose example when requested?