Improve bud create logging

$ bud create testbud
| Created: go.mod
| Created: package.json
| Created: .gitignore
| Created: public/favicon.ico
| Installed: go modules
| Installed: node modules
| Generated: bud
| Ready: testbud

1. I think we should say Created: testbud/go.mod, etc. because it was unclear where those files were being written.
2. We should be more explicit about next steps, maybe cd testbud && bud run?

Any sources of inspiration we could draw on here from other libraries and ecosystems?