feat: add rails configuration

[smilovanovic]

This PR adds Rails configuration and addresses the issue #25

Regarding the comment from the issue, I had no problem after terminating the debugging session nor adding new breakpoints after the start

However, the issue is, the server continues to run after the debugging session ends, resulting in a need to kill that server in order to start a new debug session (which happens fairly frequently, as you can't seem to add more breakpoints once you start).

[ewal]

Would love this to be merged! 🥳

[suketa]

Thank you

[smilovanovic]

@suketa I forgot to update the README.md, it still says that rails is not supported