feat: implement media listing with sorting and filtering options

libertas_core/src/schema.rs

@@ -52,3 +52,29 @@ pub struct UserResponse {
     pub username: String,
     pub email: String,
 }
+
+#[derive(Debug, Clone)]
+pub enum SortOrder {
+    Asc,
+    Desc,
+}
+
+#[derive(Debug, Clone)]
+pub struct SortParams {
+    pub sort_by: String,
+    pub sort_order: SortOrder,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct FilterParams {
+    // In the future, you can add fields like:
+    // pub mime_type: Option<String>,
+    // pub date_range: Option<(chrono::DateTime<chrono::Utc>, chrono::DateTime<chrono::Utc>)>,
+}
+
+#[derive(Debug, Clone)]
+pub struct ListMediaOptions {
+    pub sort: Option<SortParams>,
+    pub filter: Option<FilterParams>,
+    // pub pagination: Option<PaginationParams>,
+}