Allow for integration with vimspector to work with Vim

[ckipp01]

Task

We currently have an artificial limitation that vim users can't use vimspector with coc-metals due to code lenses. While that used to be true, but that's not the case anymore. I believe we need to just provide examples for what to put in the .vimspector.json file, and then it should work since Metals can handle things coming in from a launch.json file.

Additional context

This is a follow-up to #83

You can find more information on the launch.json here.

Search terms
dap, debugger, vim