fix: introduce codex-protocol crate (#2355)

codex-rs/protocol/src/parse_command.rs

@@ -0,0 +1,38 @@
+use serde::Deserialize;
+use serde::Serialize;
+
+#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
+pub enum ParsedCommand {
+    Read {
+        cmd: String,
+        name: String,
+    },
+    ListFiles {
+        cmd: String,
+        path: Option<String>,
+    },
+    Search {
+        cmd: String,
+        query: Option<String>,
+        path: Option<String>,
+    },
+    Format {
+        cmd: String,
+        tool: Option<String>,
+        targets: Option<Vec<String>>,
+    },
+    Test {
+        cmd: String,
+    },
+    Lint {
+        cmd: String,
+        tool: Option<String>,
+        targets: Option<Vec<String>>,
+    },
+    Noop {
+        cmd: String,
+    },
+    Unknown {
+        cmd: String,
+    },
+}