feat: introduce logging

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/crunch-cli/src/logging.rs

@@ -0,0 +1,41 @@
+use clap::ValueEnum;
+use tracing::Level;
+
+#[derive(Clone, ValueEnum)]
+pub enum LogArg {
+    None,
+    Trace,
+    Debug,
+    Info,
+    Warn,
+    Error,
+}
+
+impl LogArg {
+    pub fn init_logging(&self) {
+        match self {
+            LogArg::None => {}
+            LogArg::Trace => {
+                tracing_subscriber::fmt()
+                    .with_max_level(Level::TRACE)
+                    .init();
+            }
+            LogArg::Debug => {
+                tracing_subscriber::fmt()
+                    .with_max_level(Level::DEBUG)
+                    .init();
+            }
+            LogArg::Info => {
+                tracing_subscriber::fmt().with_max_level(Level::INFO).init();
+            }
+            LogArg::Warn => {
+                tracing_subscriber::fmt().with_max_level(Level::WARN).init();
+            }
+            LogArg::Error => {
+                tracing_subscriber::fmt()
+                    .with_max_level(Level::ERROR)
+                    .init();
+            }
+        }
+    }
+}