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/idle.rs

@@ -10,7 +10,7 @@
 use crate::thalamus::{home, now, notify};
 use serde::{Deserialize, Serialize};
 use std::fs;
-use tracing::info;
+use log::info;
 
 // Defaults
 pub const DEFAULT_IDLE_TIMEOUT: f64 = 5.0 * 60.0;