Add support for dap to debug tests

[elken]

Allows debug tests to be invoked through neotest.

I've tested locally and it works as expected with nearest test, but it would also be worth testing with a minimal file. If you want me to add some tests for this I'm happy to 😄

Thanks for a great package!

[olimorris]

Thanks so much for this!! This had been on my todo list for a very long time and can't wait to try it out.

[elken]

I didn't notice until this morning that it wasn't 😄 Was surprisingly simple to setup in the end, though would be nice if upstream neotest had better adpater docs

[olimorris]

Completely agree. I think all of us adapter contributors have just learned from one another's efforts.