bootstrap SFTP subsystem

bin/cluelesshd-sftp-server/Cargo.toml

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+[package]
+name = "cluelesshd-sftp-server"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+eyre.workspace = true
+tracing.workspace = true
+tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
+
+[lints]
+workspace = true

bin/cluelesshd-sftp-server/README.md

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+# cluelesshd-sftp-server
+
+SFTP server for cluelesshd.

bin/cluelesshd-sftp-server/src/main.rs

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+use eyre::Result;
+use tracing::info;
+use tracing_subscriber::EnvFilter;
+
+fn main() -> Result<()> {
+    let env_filter =
+        EnvFilter::try_from_env("SFTP_LOG").unwrap_or_else(|_| EnvFilter::new("debug"));
+
+    tracing_subscriber::fmt()
+        .with_writer(std::io::stderr)
+        .with_env_filter(env_filter)
+        .init();
+
+    info!("mroooow!");
+
+    Ok(())
+}