feat: 封装日志基础设施

crates/oxide_log/src/level.rs

@@ -0,0 +1,22 @@
+#[repr(u8)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub enum Level {
+    Off = 0,
+    Error = 1,
+    Warn = 2,
+    Info = 3,
+    Debug = 4,
+    Trace = 5,
+}
+
+impl Level {
+    pub fn as_tracing_level(self) -> tracing::Level {
+        match self {
+            Level::Off | Level::Error => tracing::Level::ERROR,
+            Level::Warn => tracing::Level::WARN,
+            Level::Info => tracing::Level::INFO,
+            Level::Debug => tracing::Level::DEBUG,
+            Level::Trace => tracing::Level::TRACE,
+        }
+    }
+}