code motion: cli related feature names (bytecodealliance#104)

* rename host runtime tests to command tests

* add a test for using wasi in a reactor

* commit cargo.lock

* reactor tests: fix wit deps

* test-programs: reactor-tests can build on stable

note that this fails because it exposes wasi-libc ctors calling import
functions from inside cabi_realloc

* test-programs: show that ctors fix in wit-bindgen fixes bug

* ci: install wasm32 targets for stable as well as nightly

* wit-bindgen: use 0.4.0

* ci: use wit-bindgen 0.4.0

* Co-habitate with wasi-common from wasmtime

* adapter: code motion in cargo feature & artifact names to cli-command, cli-reactor

there will shortly be a third type of reactor (non-cli, idk what to call it)

---------

Co-authored-by: Trevor Elliott <telliott@fastly.com>

src/lib.rs

@@ -16,11 +16,16 @@ use poll::Pollable;
 use streams::{InputStream, OutputStream};
 use wasi::*;
 
+#[cfg(all(feature = "cli-command", feature = "cli-reactor"))]
+compile_error!(
+    "only one of the `cli-command` and `cli-reactor` features may be selected at a time"
+);
+
 #[macro_use]
 mod macros;
 
 mod bindings {
-    #[cfg(feature = "command")]
+    #[cfg(feature = "cli-command")]
     wit_bindgen::generate!({
         world: "cli",
         std_feature,
@@ -30,7 +35,7 @@ mod bindings {
         skip: ["command", "preopens", "get-environment"],
     });
 
-    #[cfg(not(feature = "command"))]
+    #[cfg(feature = "cli-reactor")]
     wit_bindgen::generate!({
         world: "cli-reactor",
         std_feature,
@@ -40,7 +45,7 @@ mod bindings {
 }
 
 #[no_mangle]
-#[cfg(feature = "command")]
+#[cfg(feature = "cli-command")]
 pub unsafe extern "C" fn command(
     stdin: InputStream,
     stdout: OutputStream,