add more documentation

Author: lukewilliamboswell

crates/README.md

@@ -0,0 +1,5 @@
+# basic-cli host
+
+These crates provide the host for the basic-cli platform.
+
+The host is a cli application that will call into roc and provides functionality to allocate memory and execute effects such as writing to stdio or making HTTP requests.

crates/roc_host/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.0.1"
 authors = ["The Roc Contributors"]
 license = "UPL-1.0"
 edition = "2021"
+description = "This provides the host implementation for the platform."
 
 [lib]
 name = "roc_host"

crates/roc_host_bin/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.0.1"
 authors = ["The Roc Contributors"]
 license = "UPL-1.0"
 edition = "2021"
+description = "This crate wraps roc_host to build an executable ready for preprocessing for surgical linking"
 
 links = "app"
 

crates/roc_host_lib/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.0.1"
 authors = ["The Roc Contributors"]
 license = "UPL-1.0"
 edition = "2021"
+description = "This crate wraps roc_host to build a static library for legacy linking"
 
 [lib]
 name = "host"