Add docs for the top-level modules (each is just a shim around a protobuf definition).

Author: pnkfelix

console-api/src/lib.rs

@@ -1,7 +1,13 @@
+/// Represents the operations performed by an async runtime.
 pub mod async_ops;
+/// Represents unique id's and Rust source locations.
 mod common;
+/// Represents interactions between the console-subscriber and a console client observing it.
 pub mod instrument;
+/// Represents updates to the resources in an async runtime.
 pub mod resources;
+/// Represents updates to the tasks in an async runtime.
 pub mod tasks;
+/// Represents events on the tracing subsystem: thread registration and span activities.
 pub mod trace;
 pub use common::*;