list warrens + explore nested folders

backend/src/fs/mod.rs

@@ -0,0 +1,24 @@
+mod dir;
+pub use dir::*;
+
+use serde::Serialize;
+
+#[derive(Debug, Clone, Copy, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub enum FileType {
+    File,
+    Directory,
+}
+
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct DirectoryEntry {
+    name: String,
+    file_type: FileType,
+}
+
+impl DirectoryEntry {
+    pub fn new(name: String, file_type: FileType) -> Self {
+        Self { name, file_type }
+    }
+}