Package documentation for flow

Author: elizarov

kotlinx-coroutines-core/README.md

@@ -70,7 +70,11 @@ Synchronization primitives (mutex).
 
 # Package kotlinx.coroutines.channels
 
-Channels -- non-blocking primitives for communicating a stream of elements between coroutines.
+Channels — non-blocking primitives for communicating a stream of elements between coroutines.
+
+# Package kotlinx.coroutines.flow
+
+Flow — asynchronous cold stream of elements.
 
 # Package kotlinx.coroutines.selects