Move eval_hook to nu-cmd-base (#10146)

I moved hook to *nu_cmd_base* instead of *nu_cli* because it will enable
other developers to continue to use hook even if they decide to write
their on cli or NOT depend on nu-cli

Then they will still have the hook functionality because they can
include nu-cmd-base

src/test_bins.rs

@@ -1,4 +1,4 @@
-use nu_command::hook::{eval_env_change_hook, eval_hook};
+use nu_cmd_base::hook::{eval_env_change_hook, eval_hook};
 use nu_engine::eval_block;
 use nu_parser::parse;
 use nu_protocol::engine::{EngineState, Stack, StateWorkingSet};