Monitor cloud events

[brooksmtownsend]

Related to #6

We publish CloudEvents for things like provider_started, actor_started, provider_stopped, and more after the above issue. We should have a module that can be instantiated and monitor for these types of events, similar to what was implemented in wasmCloud/wasmCloud#183.

The goal of such a module would be to provide a way to monitor events that occur in a wasmcloud host / lattice, which could either be used to replay events leading up to an issue or assert that specific events had occurred. For example, when we write tests that start a provider, we can ensure that the provider has had enough time to spawn as a process and is ready for invocations.

[stevelr]

taken care of by other issues