Editing Books (#13535)

* start work on ui

* Move notebooks complete

* Simplify version handling

* fix issues with add section method

* fix issues with the edit experience and add the quick pick for editing

* add version handler for re-writing tocs

* fix book toc manager tests

* add notebook test

* fix localize constant

* normalize paths on windows

* check that a section has sections before attempting to mve files

* Implement method for renaming duplicated files

* moving last notebook from section converts the section into notebook

* Add recovery method restore original state of file system

* Add clean up, for files that are copied instead of renamed

* remove dir complexity

* divide edit book in methods for easier testing and remove promise chain

* Keep structure of toc

* normalize paths on windows

* fix external link

* Add other fields for versions

* fix paths in uri of findSection

* add section to section test

* Add error messages

* address pr comments and add tests

* check that the new path of a notebook is different from the original path before deleting

extensions/notebook/package.nls.json

@@ -48,5 +48,6 @@
 	"title.openNotebookFolder": "Open Notebooks in Folder",
 	"title.openRemoteJupyterBook": "Add Remote Jupyter Book",
 	"title.pinNotebook": "Pin Notebook",
-	"title.unpinNotebook": "Unpin Notebook"
+	"title.unpinNotebook": "Unpin Notebook",
+	"title.moveTo": "Move to ..."
 }