documentation and folded item delegates from old code back in

app/task/import/import.h

@@ -24,6 +24,14 @@
 #include "project/item/folder/folder.h"
 #include "task/task.h"
 
+/**
+ * @brief The ImportTask class
+ *
+ * A background task to create Footage objects from a list of URLs, and then create ProbeTasks for each of them.
+ *
+ * Using this Task is the best way to import media into a project since it will run in the background/multithreaded
+ * without pausing the main thread.
+ */
 class ImportTask : public Task
 {
   Q_OBJECT

app/task/probe/probe.h

@@ -24,6 +24,16 @@
 #include "project/item/footage/footage.h"
 #include "task/task.h"
 
+/**
+ * @brief The ProbeTask class
+ *
+ * A background task for probing a certain Footage file for its metadata and determining if we have a viable decoder
+ * for it.
+ *
+ * Currently this function just calls olive::ProbeMedia() which will call Footage::Clear(), clearing the Footage of
+ * any previous metadata before passing it through the available decoders until it finds one that can parse it.
+ * The ProbeTask mostly functions as a background/multithreaded wrapper for this functionality.
+ */
 class ProbeTask : public Task
 {
   Q_OBJECT