Improve changelog formatting as well as default conventional config

[noahnu]

The default conventional config supports parsing commit messages but doesn't support changelog generation. For changelog generation, Monodeploy itself uses tophat/commit-utils which yields something like https://github.com/tophat/monodeploy/releases/tag/monodeploy%403.2.0. This is quite verbose compared to something like React's release: https://github.com/facebook/react/releases/tag/v18.2.0

I'd like a more compact default for changelogs (perhaps we need to rethink how we aggregate the changelogs as well?).