Badges may conflict with existing packages

[expede]

Summary

Problem

The autogenerated badges may conflict with existing packages. See issue on Rhizome: https://github.com/RhizomeDB/rs-rhizome/issues/90

Impact

The README can point to random other people's projects

Solution

It may be more work than it's worth, but checking if the project name being generated is already taken on Crates and NPM is one approach. Even printing a reminder to check would be a good thing.

[zeeshanlakhani]

Yeah. The generator can't make network calls :). But, I will add it to the documentation as a check.