Add transactions for temporary modifications to the document (#77)

* Add transactions for temporary modifications to the document

* Add DiscardTempFolder Operation

* Add clearFolder operation

* Rename Temp to Work

core/document/src/operation.rs

@@ -1,5 +1,6 @@
 use crate::LayerId;
 
+#[derive(Debug, Clone, PartialEq)]
 pub enum Operation {
 	AddCircle {
 		path: Vec<LayerId>,
@@ -39,4 +40,10 @@ pub enum Operation {
 	AddFolder {
 		path: Vec<LayerId>,
 	},
+	MountWorkingFolder {
+		path: Vec<LayerId>,
+	},
+	DiscardWorkingFolder,
+	ClearWorkingFolder,
+	CommitTransaction,
 }