Plan a plugin architecture of rbkit

[gnufied]

I think, it will be quite essential to have a plugin architecture of RBKit which can be used to send and register random instrumentation via RBKit. Such as ActiveRecord query logs etc.

[swanandp]

:+1: This would be nice!

[emilsoman]

We can add a new command "enable_method_call_tracepoint"/"disable_method_call_tracepoint" , and pass the method names as the payload. The server can just enable the tracepoint RUBY_EVENT_CALL and send out messages when the method name matches.