deps: replace tracing with log+env_logger, drop console-subscriber

Switch all tracing::{info,warn,error} to log::{info,warn,error}.
Replace tracing_subscriber::fmt::init() with env_logger::init().
Drop tracing, tracing-subscriber, tracing-appender as direct deps.
Drop console feature from jobkit (was pulling in console-subscriber
which pulled in tracing-subscriber).

tracing still compiled as transitive dep of reqwest and tui-markdown,
but our code no longer depends on it.

Co-Authored-By: Kent Overstreet <kent.overstreet@linux.dev>

src/thalamus/channels.rs

@@ -10,7 +10,7 @@ use capnp_rpc::{rpc_twoparty_capnp, twoparty, RpcSystem};
 use futures::AsyncReadExt;
 use tokio::net::UnixStream;
 use tokio_util::compat::TokioAsyncReadCompatExt;
-use tracing::{info, warn};
+use log::{info, warn};
 
 use crate::channel_capnp::{channel_client, channel_server};
 use capnp::capability::Promise;