Convert all other veloren crates to use tracing

- Completely removed both `log` and `pretty_env_logger` and replaced
with `tracing` and `tracing_subscriber` where necessary.

- Converted all `log::info!(...)` et al. statements to just use the
shorthand macro i.e. `info!`. This was mostly to make renaming easier.

server-cli/Cargo.toml

@@ -12,5 +12,5 @@ default = ["worldgen"]
 server = { package = "veloren-server", path = "../server", default-features = false }
 common = { package = "veloren-common", path = "../common" }
 
-log = "0.4.8"
-pretty_env_logger = "0.3.1"
+tracing = { version = "0.1", default-features = false , features = ["attributes"] }
+tracing-subscriber = { version = "0.2.3", default-features = false, features = ["fmt", "chrono", "ansi", "smallvec"] }

server-cli/src/main.rs

@@ -2,9 +2,9 @@
 #![allow(clippy::option_map_unit_fn)]
 
 use common::clock::Clock;
-use log::info;
 use server::{Event, Input, Server, ServerSettings};
 use std::time::Duration;
+use tracing::info;
 
 const TPS: u64 = 30;
 
@@ -14,7 +14,8 @@ fn main() {
     if let Err(_) = std::env::var("RUST_LOG") {
         std::env::set_var("RUST_LOG", "info");
     }
-    pretty_env_logger::init();
+
+    tracing_subscriber::fmt::init();
 
     info!("Starting server...");