Route document browse roots through platform services

src/platform_api/platform_services.h

@@ -43,6 +43,9 @@ public:
     virtual void clear_recorded_files(std::string_view recording_path) = 0;
     virtual void publish_exported_image(std::string_view path) = 0;
     virtual void flush_persistent_storage() = 0;
+    [[nodiscard]] virtual std::vector<std::string> document_browse_roots(
+        std::string_view work_path,
+        std::string_view data_path) = 0;
     [[nodiscard]] virtual bool enables_live_asset_reloading() = 0;
     virtual void update_platform_frame(float delta_time_seconds) = 0;
     virtual void report_rendered_frames(int frames) = 0;