feat: replace env_logger with tracing_subscriber

This allows to get iroh logs with
RUST_LOG=iroh_net=trace

deltachat-repl/Cargo.toml

@@ -11,10 +11,10 @@ anyhow = "1"
 deltachat = { path = "..", features = ["internals"]}
 dirs = "5"
 log = "0.4.21"
-pretty_env_logger = "0.5"
 rusqlite = "0.31"
 rustyline = "14"
 tokio = { version = "1.37.0", features = ["fs", "rt-multi-thread", "macros"] }
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 
 [features]
 default = ["vendored"]